commit f604d5319156c60d09fef25b258824ffe28774b6
Author: Rosmontis_Cloud <2451830085@qq.com>
Date:   Wed Jul 1 16:31:35 2026 +0800

    Initial commit: C# 学习笔记和示例代码
    
    - Lesson 01-10: C# 基础语法
    - WebView2: 集成示例
    - notes/: 详细笔记

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..3cf4ff9
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,25 @@
+# .NET
+bin/
+obj/
+*.user
+*.suo
+*.cache
+*.log
+
+# IDE
+.vs/
+.vscode/
+*.swp
+
+# Build results
+[Dd]ebug/
+[Rr]elease/
+x64/
+x86/
+
+# NuGet
+packages/
+*.nupkg
+
+# WebView2
+*.WebView2/
diff --git a/WebView2Demo b/WebView2Demo
new file mode 160000
index 0000000..1d85cb1
--- /dev/null
+++ b/WebView2Demo
@@ -0,0 +1 @@
+Subproject commit 1d85cb160f81d5a41125d348f97c01b2db0a09b4
diff --git a/lessons/Lesson02/Lesson02.csproj b/lessons/Lesson02/Lesson02.csproj
new file mode 100644
index 0000000..2150e37
--- /dev/null
+++ b/lessons/Lesson02/Lesson02.csproj
@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>
diff --git a/lessons/Lesson02/Program.cs b/lessons/Lesson02/Program.cs
new file mode 100644
index 0000000..5a0173b
--- /dev/null
+++ b/lessons/Lesson02/Program.cs
@@ -0,0 +1,67 @@
+using System;
+
+namespace Lesson02
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            // ========== 变量 ==========
+            int age = 25;
+            double height = 175.5;
+            string name = "无言势字幕";
+            char grade = 'A';
+            bool isActive = true;
+
+            Console.WriteLine("=== 变量 ===");
+            Console.WriteLine($"姓名: {name}");
+            Console.WriteLine($"年龄: {age}");
+            Console.WriteLine($"身高: {height}cm");
+            Console.WriteLine($"等级: {grade}");
+            Console.WriteLine($"状态: {isActive}");
+
+            // ========== var 自动推断 ==========
+            Console.WriteLine("\n=== var 自动推断 ===");
+            var message = "这是 string 类型";
+            var number = 42;  // 推断为 int
+            Console.WriteLine($"message 是: {message.GetType()}");
+            Console.WriteLine($"number 是: {number.GetType()}");
+
+            // ========== 常量 ==========
+            Console.WriteLine("\n=== 常量 ===");
+            const int MAX_RETRY = 3;
+            const string VERSION = "v1.0";
+            Console.WriteLine($"最大重试次数: {MAX_RETRY}");
+            Console.WriteLine($"版本: {VERSION}");
+
+            // ========== 类型转换 ==========
+            Console.WriteLine("\n=== 类型转换 ===");
+            int i = 10;
+            double d = i;  // 隐式转换
+            Console.WriteLine($"int -> double: {d}");
+
+            double d2 = 3.14;
+            int i2 = (int)d2;  // 显式转换
+            Console.WriteLine($"double -> int: {i2}");
+
+            string s = i.ToString();
+            Console.WriteLine($"int -> string: {s}");
+
+            int i3 = int.Parse("123");
+            Console.WriteLine($"string \"123\" -> int: {i3}");
+
+            // ========== 输入练习 ==========
+            Console.WriteLine("\n=== 输入练习 ===");
+            Console.Write("请输入你的名字: ");
+            string inputName = Console.ReadLine();
+            Console.Write($"你好, {inputName}! ");
+
+            Console.Write("请输入年龄: ");
+            string ageInput = Console.ReadLine();
+            int userAge = int.Parse(ageInput);
+            Console.WriteLine($"你 {userAge} 岁了");
+
+            Console.ReadLine();
+        }
+    }
+}
diff --git a/lessons/Lesson03/Lesson03.csproj b/lessons/Lesson03/Lesson03.csproj
new file mode 100644
index 0000000..2150e37
--- /dev/null
+++ b/lessons/Lesson03/Lesson03.csproj
@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>
diff --git a/lessons/Lesson03/Program.cs b/lessons/Lesson03/Program.cs
new file mode 100644
index 0000000..1531250
--- /dev/null
+++ b/lessons/Lesson03/Program.cs
@@ -0,0 +1,96 @@
+using System;
+
+namespace Lesson03
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            // ========== if / else ==========
+            Console.WriteLine("=== if / else ===");
+            int score = 85;
+
+            if (score >= 90)
+            {
+                Console.WriteLine("优秀");
+            }
+            else if (score >= 60)
+            {
+                Console.WriteLine("及格");
+            }
+            else
+            {
+                Console.WriteLine("不及格");
+            }
+
+            // 三元运算符
+            string result = score >= 60 ? "及格" : "不及格";
+            Console.WriteLine($"三元运算: {result}");
+
+            // ========== switch ==========
+            Console.WriteLine("\n=== switch ===");
+            int day = 3;
+
+            switch (day)
+            {
+                case 1:
+                    Console.WriteLine("星期一");
+                    break;
+                case 2:
+                    Console.WriteLine("星期二");
+                    break;
+                case 3:
+                    Console.WriteLine("星期三");
+                    break;
+                default:
+                    Console.WriteLine("其他");
+                    break;
+            }
+
+            // ========== for 循环 ==========
+            Console.WriteLine("\n=== for 循环 ===");
+            for (int i = 0; i < 5; i++)
+            {
+                Console.WriteLine($"计数: {i}");
+            }
+
+            // ========== foreach ==========
+            Console.WriteLine("\n=== foreach 循环 ===");
+            string[] names = { "无言势", "VRChat", "字幕" };
+
+            foreach (string name in names)
+            {
+                Console.WriteLine(name);
+            }
+
+            // ========== while 循环 ==========
+            Console.WriteLine("\n=== while 循环 ===");
+            int count = 0;
+            while (count < 3)
+            {
+                Console.WriteLine($"while: {count}");
+                count++;
+            }
+
+            // ========== do while ==========
+            Console.WriteLine("\n=== do while ===");
+            int n = 0;
+            do
+            {
+                Console.WriteLine($"do while: {n}");
+                n++;
+            } while (n < 3);
+
+            // ========== break 和 continue ==========
+            Console.WriteLine("\n=== break 和 continue ===");
+            for (int i = 0; i < 10; i++)
+            {
+                if (i == 3) continue;  // 跳过 3
+                if (i == 7) break;    // 退出循环
+                Console.WriteLine(i);
+            }
+
+            Console.ReadLine();
+        }
+    }
+}
diff --git a/lessons/Lesson04/Lesson04.csproj b/lessons/Lesson04/Lesson04.csproj
new file mode 100644
index 0000000..2150e37
--- /dev/null
+++ b/lessons/Lesson04/Lesson04.csproj
@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>
diff --git a/lessons/Lesson04/Program.cs b/lessons/Lesson04/Program.cs
new file mode 100644
index 0000000..3b7c7bd
--- /dev/null
+++ b/lessons/Lesson04/Program.cs
@@ -0,0 +1,119 @@
+using System;
+
+namespace Lesson04
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            // ========== 方法调用 ==========
+            Console.WriteLine("=== 方法 ===");
+            SayHello("无言势");
+            int sum = Add(10, 20);
+            Console.WriteLine($"10 + 20 = {sum}");
+
+            // 带默认参数
+            Greet();
+            Greet("VRC");
+
+            // ========== 类和对象 ==========
+            Console.WriteLine("\n=== 类和对象 ===");
+            Person p1 = new Person("无言势", 25);
+            Person p2 = new Person("玩家A", 30);
+
+            p1.SayHi();
+            p2.SayHi();
+
+            // ========== 静态方法 ==========
+            Console.WriteLine("\n=== 静态方法 ===");
+            int result = MathHelper.Add(100, 200);
+            Console.WriteLine($"100 + 200 = {result}");
+
+            double pi = MathHelper.GetPI();
+            Console.WriteLine($"PI ≈ {pi}");
+
+            // ========== 面向对象练习 ==========
+            Console.WriteLine("\n=== 麦克风类 ===");
+            Microphone mic = new Microphone("USB麦克风", true);
+            mic.ToggleListening();
+            mic.ToggleListening();
+
+            Console.ReadLine();
+        }
+
+        // ========== 方法定义 ==========
+        static void SayHello(string name)
+        {
+            Console.WriteLine($"你好, {name}!");
+        }
+
+        static int Add(int a, int b)
+        {
+            return a + b;
+        }
+
+        static void Greet(string name = "World")
+        {
+            Console.WriteLine($"Hello, {name}");
+        }
+    }
+
+    // ========== 类定义 ==========
+    class Person
+    {
+        public string name;
+        public int age;
+
+        // 构造函数
+        public Person(string name, int age)
+        {
+            this.name = name;
+            this.age = age;
+        }
+
+        public void SayHi()
+        {
+            Console.WriteLine($"我是{name}，今年{age}岁");
+        }
+    }
+
+    // 静态类
+    static class MathHelper
+    {
+        public static int Add(int a, int b)
+        {
+            return a + b;
+        }
+
+        public static double GetPI()
+        {
+            return 3.14159;
+        }
+    }
+
+    // 麦克风类 - 结合项目练习
+    class Microphone
+    {
+        private string name;
+        private bool isListening;
+
+        public Microphone(string name, bool isListening)
+        {
+            this.name = name;
+            this.isListening = isListening;
+        }
+
+        public void ToggleListening()
+        {
+            isListening = !isListening;
+            if (isListening)
+            {
+                Console.WriteLine($"[{name}] 开始监听...");
+            }
+            else
+            {
+                Console.WriteLine($"[{name}] 停止监听");
+            }
+        }
+    }
+}
diff --git a/lessons/Lesson05/Helpers/MathHelper.cs b/lessons/Lesson05/Helpers/MathHelper.cs
new file mode 100644
index 0000000..b8b81ad
--- /dev/null
+++ b/lessons/Lesson05/Helpers/MathHelper.cs
@@ -0,0 +1,27 @@
+using System;
+
+namespace Lesson05.Helpers
+{
+    static class MathHelper
+    {
+        public static int Add(int a, int b)
+        {
+            return a + b;
+        }
+
+        public static int Multiply(int a, int b)
+        {
+            return a * b;
+        }
+
+        public static double Divide(int a, int b)
+        {
+            if (b == 0)
+            {
+                Console.WriteLine("除数不能为0！");
+                return 0;
+            }
+            return (double)a / b;
+        }
+    }
+}
diff --git a/lessons/Lesson05/Lesson05.csproj b/lessons/Lesson05/Lesson05.csproj
new file mode 100644
index 0000000..2150e37
--- /dev/null
+++ b/lessons/Lesson05/Lesson05.csproj
@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>
diff --git a/lessons/Lesson05/Models/Person.cs b/lessons/Lesson05/Models/Person.cs
new file mode 100644
index 0000000..ce1327a
--- /dev/null
+++ b/lessons/Lesson05/Models/Person.cs
@@ -0,0 +1,46 @@
+using System;
+
+namespace Lesson05.Models
+{
+    class Person
+    {
+        // public: 任何地方都能访问
+        public string name;
+
+        // private: 只有本类内部能访问
+        private int age;
+        private string secret = "秘密信息";
+
+        // Property: 受保护的访问方式
+        public int Age
+        {
+            get { return age; }
+            set
+            {
+                // value 是关键字，表示赋值时的右值
+                if (value < 0) value = 0;
+                if (value > 150) value = 150;
+                age = value;
+            }
+        }
+
+        // 构造函数
+        public Person(string name, int age)
+        {
+            this.name = name;
+            this.Age = age;  // 通过 Property 设置，自动限制范围
+        }
+
+        public void SayHi()
+        {
+            Console.WriteLine($"我是 {name}，今年 {age} 岁");
+            Console.WriteLine($"我的秘密: {GetSecret()}");  // 本类内可以调用私有方法
+        }
+
+        // 私有方法：本类内部使用
+        private string GetSecret()
+        {
+            return secret;
+        }
+    }
+}
diff --git a/lessons/Lesson05/Program.cs b/lessons/Lesson05/Program.cs
new file mode 100644
index 0000000..c9b8e5f
--- /dev/null
+++ b/lessons/Lesson05/Program.cs
@@ -0,0 +1,42 @@
+using System;
+using Lesson05.Models;
+using Lesson05.Services;
+using Lesson05.Helpers;
+
+namespace Lesson05
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine("=== 多文件项目演示 ===\n");
+
+            // 使用 Models 里的类
+            Person p = new Person("无言势", 25);
+            p.SayHi();
+
+            // 使用 Property
+            p.Age = -5;   // 会自动限制范围
+            Console.WriteLine($"设置后年龄: {p.Age}");
+
+            p.Age = 200;
+            Console.WriteLine($"设置后年龄: {p.Age}");
+
+            // 使用 Services
+            AudioService service = new AudioService();
+            service.StartListening();
+            service.StopListening();
+
+            // 使用 Helpers
+            int sum = MathHelper.Add(100, 200);
+            Console.WriteLine($"\n100 + 200 = {sum}");
+
+            // 演示 private 无法访问
+            // p.secret = "xxx";  // 编译错误
+            // p.SetSecret("xxx"); // 编译错误
+
+            Console.WriteLine("\n=== 演示完成 ===");
+            Console.ReadLine();
+        }
+    }
+}
diff --git a/lessons/Lesson05/Services/AudioService.cs b/lessons/Lesson05/Services/AudioService.cs
new file mode 100644
index 0000000..2500521
--- /dev/null
+++ b/lessons/Lesson05/Services/AudioService.cs
@@ -0,0 +1,39 @@
+using System;
+
+namespace Lesson05.Services
+{
+    class AudioService
+    {
+        private bool isListening;
+        private string deviceName;
+
+        public AudioService()
+        {
+            this.deviceName = "默认麦克风";
+            this.isListening = false;
+        }
+
+        public void StartListening()
+        {
+            if (!isListening)
+            {
+                isListening = true;
+                Console.WriteLine($"[{deviceName}] 开始监听...");
+            }
+        }
+
+        public void StopListening()
+        {
+            if (isListening)
+            {
+                isListening = false;
+                Console.WriteLine($"[{deviceName}] 停止监听");
+            }
+        }
+
+        public bool IsListening()
+        {
+            return isListening;
+        }
+    }
+}
diff --git a/lessons/Lesson06/Animals/Animal.cs b/lessons/Lesson06/Animals/Animal.cs
new file mode 100644
index 0000000..7d7319a
--- /dev/null
+++ b/lessons/Lesson06/Animals/Animal.cs
@@ -0,0 +1,25 @@
+using System;
+
+namespace Lesson06.Animals
+{
+    class Animal
+    {
+        protected string name;
+
+        public Animal(string name)
+        {
+            this.name = name;
+        }
+
+        public void Eat()
+        {
+            Console.WriteLine($"{name} 在吃东西");
+        }
+
+        // virtual 允许子类重写
+        public virtual void Speak()
+        {
+            Console.WriteLine($"{name} 发出了声音");
+        }
+    }
+}
diff --git a/lessons/Lesson06/Animals/Cat.cs b/lessons/Lesson06/Animals/Cat.cs
new file mode 100644
index 0000000..8808970
--- /dev/null
+++ b/lessons/Lesson06/Animals/Cat.cs
@@ -0,0 +1,16 @@
+using System;
+
+namespace Lesson06.Animals
+{
+    class Cat : Animal
+    {
+        public Cat(string name) : base(name)
+        {
+        }
+
+        public override void Speak()
+        {
+            Console.WriteLine($"{name} 喵喵喵~");
+        }
+    }
+}
diff --git a/lessons/Lesson06/Animals/Dog.cs b/lessons/Lesson06/Animals/Dog.cs
new file mode 100644
index 0000000..8cbe59b
--- /dev/null
+++ b/lessons/Lesson06/Animals/Dog.cs
@@ -0,0 +1,27 @@
+using System;
+
+namespace Lesson06.Animals
+{
+    class Dog : Animal
+    {
+        private string breed;
+
+        // base(name) 调用父类的构造函数
+        public Dog(string name, string breed) : base(name)
+        {
+            this.breed = breed;
+        }
+
+        public void Info()
+        {
+            Console.WriteLine($"名字: {name}, 品种: {breed}");
+        }
+
+        // 重写父类方法
+        public override void Speak()
+        {
+            base.Speak();  // 先调用父类方法
+            Console.WriteLine($"{name} 汪汪汪!");
+        }
+    }
+}
diff --git a/lessons/Lesson06/Devices/Camera.cs b/lessons/Lesson06/Devices/Camera.cs
new file mode 100644
index 0000000..6a585dc
--- /dev/null
+++ b/lessons/Lesson06/Devices/Camera.cs
@@ -0,0 +1,34 @@
+using System;
+
+namespace Lesson06.Devices
+{
+    class Camera : IDevice
+    {
+        private string name;
+        public bool IsConnected { get; private set; }
+
+        public Camera(string name)
+        {
+            this.name = name;
+            this.IsConnected = false;
+        }
+
+        public void Connect()
+        {
+            if (!IsConnected)
+            {
+                IsConnected = true;
+                Console.WriteLine($"[{name}] 摄像头已连接");
+            }
+        }
+
+        public void Disconnect()
+        {
+            if (IsConnected)
+            {
+                IsConnected = false;
+                Console.WriteLine($"[{name}] 摄像头已断开");
+            }
+        }
+    }
+}
diff --git a/lessons/Lesson06/Devices/IDevice.cs b/lessons/Lesson06/Devices/IDevice.cs
new file mode 100644
index 0000000..e448f41
--- /dev/null
+++ b/lessons/Lesson06/Devices/IDevice.cs
@@ -0,0 +1,10 @@
+namespace Lesson06.Devices
+{
+    // 接口：定义契约
+    interface IDevice
+    {
+        void Connect();
+        void Disconnect();
+        bool IsConnected { get; }
+    }
+}
diff --git a/lessons/Lesson06/Devices/Microphone.cs b/lessons/Lesson06/Devices/Microphone.cs
new file mode 100644
index 0000000..068ebf5
--- /dev/null
+++ b/lessons/Lesson06/Devices/Microphone.cs
@@ -0,0 +1,34 @@
+using System;
+
+namespace Lesson06.Devices
+{
+    class Microphone : IDevice
+    {
+        private string name;
+        public bool IsConnected { get; private set; }
+
+        public Microphone(string name)
+        {
+            this.name = name;
+            this.IsConnected = false;
+        }
+
+        public void Connect()
+        {
+            if (!IsConnected)
+            {
+                IsConnected = true;
+                Console.WriteLine($"[{name}] 麦克风已连接");
+            }
+        }
+
+        public void Disconnect()
+        {
+            if (IsConnected)
+            {
+                IsConnected = false;
+                Console.WriteLine($"[{name}] 麦克风已断开");
+            }
+        }
+    }
+}
diff --git a/lessons/Lesson06/Lesson06.csproj b/lessons/Lesson06/Lesson06.csproj
new file mode 100644
index 0000000..2150e37
--- /dev/null
+++ b/lessons/Lesson06/Lesson06.csproj
@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>
diff --git a/lessons/Lesson06/Program.cs b/lessons/Lesson06/Program.cs
new file mode 100644
index 0000000..010b699
--- /dev/null
+++ b/lessons/Lesson06/Program.cs
@@ -0,0 +1,55 @@
+using System;
+using Lesson06.Animals;
+using Lesson06.Devices;
+
+namespace Lesson06
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine("=== 继承演示 ===\n");
+
+            // 继承：Dog 继承了 Animal
+            Dog dog = new Dog("旺财", "金毛");
+            dog.Eat();
+            dog.Speak();
+            dog.Info();
+
+            Console.WriteLine("\n=== 方法重写 ===\n");
+
+            // 多态：Cat 和 Dog 重写了 Speak
+            Animal cat = new Cat("小猫");
+            Animal dog2 = new Dog("二狗", "哈士奇");
+
+            cat.Speak();
+            dog2.Speak();
+
+            Console.WriteLine("\n=== 接口演示 ===\n");
+
+            // 使用接口
+            Microphone mic = new Microphone("USB麦克风");
+            Camera cam = new Camera("RTSP摄像头");
+
+            mic.Connect();
+            mic.Disconnect();
+
+            Console.WriteLine();
+
+            cam.Connect();
+            cam.Disconnect();
+
+            Console.WriteLine("\n=== 接口多态 ===\n");
+
+            // 接口类型可以指向任何实现它的类
+            IDevice device1 = new Microphone("设备A");
+            IDevice device2 = new Camera("设备B");
+
+            device1.Connect();
+            device2.Connect();
+
+            Console.WriteLine("\n=== 完成 ===");
+            Console.ReadLine();
+        }
+    }
+}
diff --git a/lessons/Lesson07/Lesson07.csproj b/lessons/Lesson07/Lesson07.csproj
new file mode 100644
index 0000000..2150e37
--- /dev/null
+++ b/lessons/Lesson07/Lesson07.csproj
@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>
diff --git a/lessons/Lesson07/Program.cs b/lessons/Lesson07/Program.cs
new file mode 100644
index 0000000..889078e
--- /dev/null
+++ b/lessons/Lesson07/Program.cs
@@ -0,0 +1,107 @@
+using System;
+using System.Collections.Generic;
+
+namespace Lesson07
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            // ========== List<T> ==========
+            Console.WriteLine("=== List<T> 动态数组 ===\n");
+
+            List<string> transcriptHistory = new List<string>();
+
+            // 添加识别结果
+            transcriptHistory.Add("今天天气真不错");
+            transcriptHistory.Add("大家一起加油");
+            transcriptHistory.Add("这个功能很简单");
+
+            Console.WriteLine($"共有 {transcriptHistory.Count} 条记录：");
+            foreach (string text in transcriptHistory)
+            {
+                Console.WriteLine($"  - {text}");
+            }
+
+            // 插入
+            transcriptHistory.Insert(1, "新插入的文字");
+            Console.WriteLine($"\n插入后共有 {transcriptHistory.Count} 条记录：");
+            foreach (string text in transcriptHistory)
+            {
+                Console.WriteLine($"  - {text}");
+            }
+
+            // 删除
+            transcriptHistory.Remove("大家一起加油");
+            Console.WriteLine($"\n删除后共有 {transcriptHistory.Count} 条记录");
+
+            // 初始化器
+            List<string> fruits = new List<string>() { "苹果", "香蕉", "橙子" };
+            Console.WriteLine($"\n水果列表：{string.Join(", ", fruits)}");
+
+            // ========== Dictionary<K, V> ==========
+            Console.WriteLine("\n=== Dictionary<K, V> 键值对 ===\n");
+
+            // 设备配置
+            Dictionary<string, string> deviceConfig = new Dictionary<string, string>()
+            {
+                ["name"] = "USB麦克风",
+                ["sampleRate"] = "16000",
+                ["channels"] = "1"
+            };
+
+            Console.WriteLine("设备配置：");
+            foreach (KeyValuePair<string, string> kv in deviceConfig)
+            {
+                Console.WriteLine($"  {kv.Key}: {kv.Value}");
+            }
+
+            // 访问单个值
+            Console.WriteLine($"\n设备名称: {deviceConfig["name"]}");
+
+            // 安全访问
+            if (deviceConfig.TryGetValue("notExist", out string value))
+            {
+                Console.WriteLine($"找到: {value}");
+            }
+            else
+            {
+                Console.WriteLine("键不存在");
+            }
+
+            // 设置选项
+            Dictionary<string, bool> settings = new Dictionary<string, bool>()
+            {
+                ["autoConnect"] = true,
+                ["vad"] = true,
+                ["debug"] = false
+            };
+
+            Console.WriteLine("\n设置选项：");
+            foreach (string key in settings.Keys)
+            {
+                string status = settings[key] ? "开启" : "关闭";
+                Console.WriteLine($"  {key}: {status}");
+            }
+
+            // ========== 数字集合 ==========
+            Console.WriteLine("\n=== 数字 List 操作 ===\n");
+
+            List<int> scores = new List<int>() { 85, 92, 78, 95, 88 };
+
+            Console.WriteLine($"原始成绩：{string.Join(", ", scores)}");
+
+            scores.Sort();
+            Console.WriteLine($"排序后：{string.Join(", ", scores)}");
+
+            scores.Reverse();
+            Console.WriteLine($"反转后：{string.Join(", ", scores)}");
+
+            Console.WriteLine($"最高分：{scores[0]}");
+            Console.WriteLine($"包含 100？ {scores.Contains(100)}");
+            Console.WriteLine($"包含 95？ {scores.Contains(95)}");
+
+            Console.ReadLine();
+        }
+    }
+}
diff --git a/lessons/Lesson08/Lesson08.csproj b/lessons/Lesson08/Lesson08.csproj
new file mode 100644
index 0000000..2150e37
--- /dev/null
+++ b/lessons/Lesson08/Lesson08.csproj
@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>
diff --git a/lessons/Lesson08/Program.cs b/lessons/Lesson08/Program.cs
new file mode 100644
index 0000000..24f7df1
--- /dev/null
+++ b/lessons/Lesson08/Program.cs
@@ -0,0 +1,187 @@
+using System;
+
+namespace Lesson08
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine("=== 异常处理演示 ===\n");
+
+            // ========== 基本 try-catch ==========
+            Console.WriteLine("--- 基本 try-catch ---");
+            try
+            {
+                int[] numbers = { 1, 2, 3 };
+                Console.WriteLine(numbers[10]);
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine($"捕获异常: {ex.Message}");
+            }
+
+            // ========== 捕获特定异常 ==========
+            Console.WriteLine("\n--- 捕获特定异常 ---");
+            string[] inputs = { "123", "abc", "9999999999999" };
+
+            foreach (string input in inputs)
+            {
+                try
+                {
+                    int num = int.Parse(input);
+                    Console.WriteLine($"转换成功: {num}");
+                }
+                catch (FormatException)
+                {
+                    Console.WriteLine($"\"{input}\" 格式错误，不是数字");
+                }
+                catch (OverflowException)
+                {
+                    Console.WriteLine($"\"{input}\" 数字太大");
+                }
+            }
+
+            // ========== throw 抛出异常 ==========
+            Console.WriteLine("\n--- throw 抛出异常 ---");
+            try
+            {
+                SetAge(-5);
+            }
+            catch (ArgumentException ex)
+            {
+                Console.WriteLine($"捕获到: {ex.Message}");
+            }
+
+            try
+            {
+                SetAge(200);
+            }
+            catch (ArgumentException ex)
+            {
+                Console.WriteLine($"捕获到: {ex.Message}");
+            }
+
+            SetAge(25);  // 正常
+            SetAge(0);   // 正常
+
+            // ========== 实际项目场景 ==========
+            Console.WriteLine("\n--- 设备连接场景 ---");
+            MicrophoneDevice mic = new MicrophoneDevice("USB麦克风");
+
+            // 场景1：设备未连接
+            try
+            {
+                mic.StartListening();
+            }
+            catch (DeviceNotConnectedException ex)
+            {
+                Console.WriteLine($"错误: {ex.Message}");
+                Console.WriteLine("建议：请检查设备连接");
+            }
+
+            // 场景2：连接后正常操作
+            mic.Connect();
+            try
+            {
+                mic.StartListening();
+                Console.WriteLine("麦克风开始监听...");
+                mic.StopListening();
+                Console.WriteLine("麦克风停止监听...");
+            }
+            catch (DeviceNotConnectedException ex)
+            {
+                Console.WriteLine($"错误: {ex.Message}");
+            }
+            finally
+            {
+                mic.Disconnect();
+                Console.WriteLine("设备已断开");
+            }
+
+            // ========== finally 演示 ==========
+            Console.WriteLine("\n--- finally 执行时机 ---");
+            try
+            {
+                Console.WriteLine("try 块执行");
+                // int x = 1 / 0;  // 解开这行会跳到 catch
+            }
+            catch
+            {
+                Console.WriteLine("catch 块执行");
+            }
+            finally
+            {
+                Console.WriteLine("finally 块总是执行");
+            }
+
+            Console.WriteLine("\n=== 演示完成 ===");
+            Console.ReadLine();
+        }
+
+        // ========== throw 示例 ==========
+        static void SetAge(int age)
+        {
+            if (age < 0 || age > 150)
+            {
+                throw new ArgumentException($"年龄必须在 0-150 之间，当前: {age}");
+            }
+            Console.WriteLine($"年龄设置为: {age}");
+        }
+    }
+
+    // ========== 自定义异常 ==========
+    class DeviceNotConnectedException : Exception
+    {
+        public DeviceNotConnectedException(string message) : base(message) { }
+        public DeviceNotConnectedException(string message, Exception inner) : base(message, inner) { }
+    }
+
+    // ========== 设备类 ==========
+    class MicrophoneDevice
+    {
+        private string name;
+        private bool isConnected;
+        private bool isListening;
+
+        public MicrophoneDevice(string name)
+        {
+            this.name = name;
+            this.isConnected = false;
+            this.isListening = false;
+        }
+
+        public void Connect()
+        {
+            isConnected = true;
+            Console.WriteLine($"[{name}] 设备已连接");
+        }
+
+        public void Disconnect()
+        {
+            isConnected = false;
+            Console.WriteLine($"[{name}] 设备已断开");
+        }
+
+        public void StartListening()
+        {
+            if (!isConnected)
+            {
+                throw new DeviceNotConnectedException($"{name} 未连接，无法开始监听");
+            }
+            if (isListening)
+            {
+                throw new InvalidOperationException($"{name} 已经在监听中");
+            }
+            isListening = true;
+        }
+
+        public void StopListening()
+        {
+            if (!isListening)
+            {
+                throw new InvalidOperationException($"{name} 没有在监听");
+            }
+            isListening = false;
+        }
+    }
+}
diff --git a/lessons/Lesson09/Lesson09.csproj b/lessons/Lesson09/Lesson09.csproj
new file mode 100644
index 0000000..2150e37
--- /dev/null
+++ b/lessons/Lesson09/Lesson09.csproj
@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>
diff --git a/lessons/Lesson09/Program.cs b/lessons/Lesson09/Program.cs
new file mode 100644
index 0000000..89be971
--- /dev/null
+++ b/lessons/Lesson09/Program.cs
@@ -0,0 +1,103 @@
+using System;
+using System.IO;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace Lesson09
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            string basePath = Directory.GetCurrentDirectory();
+            string testFile = Path.Combine(basePath, "test.txt");
+            string configFile = Path.Combine(basePath, "config.json");
+            string logFile = Path.Combine(basePath, "app.log");
+
+            Console.WriteLine("=== 文件读写演示 ===\n");
+
+            // ========== 写入文本文件 ==========
+            Console.WriteLine("--- 写入文本文件 ---");
+            string content = "第一行：无言势字幕\n第二行：VRChat 语音识别工具";
+            File.WriteAllText(testFile, content);
+            Console.WriteLine($"已写入: {testFile}");
+
+            // ========== 读取文本文件 ==========
+            Console.WriteLine("\n--- 读取文本文件 ---");
+            string readContent = File.ReadAllText(testFile);
+            Console.WriteLine("文件内容：");
+            Console.WriteLine(readContent);
+
+            // ========== 按行读写 ==========
+            Console.WriteLine("\n--- 按行读取 ---");
+            string[] lines = File.ReadAllLines(testFile);
+            for (int i = 0; i < lines.Length; i++)
+            {
+                Console.WriteLine($"行 {i + 1}: {lines[i]}");
+            }
+
+            // ========== JSON 配置 ==========
+            Console.WriteLine("\n--- JSON 配置读写 ---");
+
+            // 创建设置对象
+            AppSettings settings = new AppSettings
+            {
+                Sensitivity = 75,
+                AutoConnect = true,
+                VadEnabled = true,
+                Language = "zh-CN"
+            };
+
+            // 序列化为 JSON
+            string json = JsonSerializer.Serialize(settings, new JsonSerializerOptions
+            {
+                WriteIndented = true  // 格式化输出
+            });
+            File.WriteAllText(configFile, json);
+            Console.WriteLine("已保存配置: config.json");
+            Console.WriteLine(json);
+
+            // 反序列化
+            string loadedJson = File.ReadAllText(configFile);
+            AppSettings loadedSettings = JsonSerializer.Deserialize<AppSettings>(loadedJson);
+            Console.WriteLine("\n读取的配置：");
+            Console.WriteLine($"  灵敏度: {loadedSettings.Sensitivity}");
+            Console.WriteLine($"  自动连接: {loadedSettings.AutoConnect}");
+            Console.WriteLine($"  VAD: {loadedSettings.VadEnabled}");
+            Console.WriteLine($"  语言: {loadedSettings.Language}");
+
+            // ========== 追加日志 ==========
+            Console.WriteLine("\n--- 追加日志 ---");
+            string timestamp = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
+            string logEntry = $"[{timestamp}] 应用启动\n";
+            File.AppendAllText(logFile, logEntry);
+            Console.WriteLine($"已追加日志: {logFile}");
+
+            // ========== 文件操作 ==========
+            Console.WriteLine("\n--- 文件操作 ---");
+            Console.WriteLine($"文件是否存在: {File.Exists(testFile)}");
+            Console.WriteLine($"文件大小: {new FileInfo(testFile).Length} 字节");
+            Console.WriteLine($"完整路径: {Path.GetFullPath(testFile)}");
+            Console.WriteLine($"扩展名: {Path.GetExtension(testFile)}");
+
+            // ========== 清理 ==========
+            Console.WriteLine("\n--- 清理测试文件 ---");
+            if (File.Exists(testFile)) File.Delete(testFile);
+            if (File.Exists(configFile)) File.Delete(configFile);
+            if (File.Exists(logFile)) File.Delete(logFile);
+            Console.WriteLine("已删除测试文件");
+
+            Console.WriteLine("\n=== 演示完成 ===");
+            Console.ReadLine();
+        }
+    }
+
+    // ========== 配置类 ==========
+    class AppSettings
+    {
+        public int Sensitivity { get; set; } = 70;
+        public bool AutoConnect { get; set; } = true;
+        public bool VadEnabled { get; set; } = true;
+        public string Language { get; set; } = "zh-CN";
+    }
+}
diff --git a/lessons/Lesson10/Lesson10.csproj b/lessons/Lesson10/Lesson10.csproj
new file mode 100644
index 0000000..2150e37
--- /dev/null
+++ b/lessons/Lesson10/Lesson10.csproj
@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>
diff --git a/lessons/Lesson10/Program.cs b/lessons/Lesson10/Program.cs
new file mode 100644
index 0000000..4b5c2bf
--- /dev/null
+++ b/lessons/Lesson10/Program.cs
@@ -0,0 +1,136 @@
+using System;
+
+namespace Lesson10
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine("=== 委托和事件演示 ===\n");
+
+            // ========== 委托 ==========
+            Console.WriteLine("--- 委托 ---");
+
+            // Action: 无返回值的委托
+            Action<string> print = (msg) => Console.WriteLine($"打印: {msg}");
+            print("Hello World");
+
+            // Func: 有返回值的委托
+            Func<int, int, int> add = (a, b) => a + b;
+            Func<int, int, int> multiply = (a, b) => a * b;
+
+            Console.WriteLine($"add(3, 5) = {add(3, 5)}");
+            Console.WriteLine($"multiply(3, 5) = {multiply(3, 5)}");
+
+            // ========== 事件 ==========
+            Console.WriteLine("\n--- 事件 ---");
+
+            Microphone mic = new Microphone("USB麦克风");
+
+            // 订阅事件 - 收到文字时
+            mic.OnTranscriptReady += (text) =>
+            {
+                Console.WriteLine($"[UI更新] 显示文字: {text}");
+            };
+
+            // 订阅事件 - 开始监听
+            mic.OnListeningStarted += () =>
+            {
+                Console.WriteLine("[UI更新] 开始播放动画");
+            };
+
+            // 订阅事件 - 停止监听
+            mic.OnListeningStopped += () =>
+            {
+                Console.WriteLine("[UI更新] 停止动画");
+            };
+
+            // 订阅事件 - 错误处理
+            mic.OnError += (error) =>
+            {
+                Console.WriteLine($"[UI更新] 显示错误: {error}");
+            };
+
+            // ========== 模拟使用流程 ==========
+            Console.WriteLine("\n--- 模拟识别流程 ---");
+
+            // 正常流程
+            mic.StartListening();
+            mic.TranscriptDetected("今天天气真不错");
+            mic.TranscriptDetected("大家一起加油");
+            mic.StopListening();
+
+            Console.WriteLine();
+
+            // 模拟错误
+            mic.StartListening();
+            mic.SimulateError("设备断开连接");
+            mic.StopListening();
+
+            Console.WriteLine("\n=== 演示完成 ===");
+            Console.ReadLine();
+        }
+    }
+
+    // ========== 麦克风类（带事件） ==========
+    class Microphone
+    {
+        private string name;
+        private bool isListening;
+
+        // 事件声明
+        public event Action<string> OnTranscriptReady;   // 识别出文字
+        public event Action OnListeningStarted;            // 开始监听
+        public event Action OnListeningStopped;            // 停止监听
+        public event Action<string> OnError;               // 错误
+
+        public Microphone(string name)
+        {
+            this.name = name;
+            this.isListening = false;
+        }
+
+        public void StartListening()
+        {
+            if (isListening)
+            {
+                OnError?.Invoke("已经在监听中");
+                return;
+            }
+
+            isListening = true;
+            Console.WriteLine($"[{name}] 开始监听");
+            OnListeningStarted?.Invoke();  // 通知所有订阅者
+        }
+
+        public void StopListening()
+        {
+            if (!isListening)
+            {
+                return;
+            }
+
+            isListening = false;
+            Console.WriteLine($"[{name}] 停止监听");
+            OnListeningStopped?.Invoke();  // 通知所有订阅者
+        }
+
+        public void TranscriptDetected(string text)
+        {
+            if (!isListening)
+            {
+                return;
+            }
+
+            Console.WriteLine($"[{name}] 识别: {text}");
+            OnTranscriptReady?.Invoke(text);  // 通知所有订阅者
+        }
+
+        // 模拟错误
+        public void SimulateError(string error)
+        {
+            Console.WriteLine($"[{name}] 错误: {error}");
+            OnError?.Invoke(error);
+        }
+    }
+}
diff --git a/lessons/Lesson_One/Lesson01_HelloWorld.cs b/lessons/Lesson_One/Lesson01_HelloWorld.cs
new file mode 100644
index 0000000..4b8a2d6
--- /dev/null
+++ b/lessons/Lesson_One/Lesson01_HelloWorld.cs
@@ -0,0 +1,24 @@
+// Lesson 01: Hello World
+// 目标：熟悉 C# 基本结构和输出
+
+using System;
+
+namespace CSharpLearning
+{
+    class Lesson01_HelloWorld
+    {
+        static void Main(string[] args)
+        {
+            // 打印 hello world
+            Console.WriteLine("Hello, World!");
+            Console.WriteLine("你好，C#!");
+
+            // 打印带格式
+            string name = "无言势字幕";
+            Console.WriteLine($"项目名称: {name}");
+
+            // 等待输入（防止窗口关闭）
+            Console.ReadLine();
+        }
+    }
+}
diff --git a/lessons/Lesson_One/Lesson_One.csproj b/lessons/Lesson_One/Lesson_One.csproj
new file mode 100644
index 0000000..2150e37
--- /dev/null
+++ b/lessons/Lesson_One/Lesson_One.csproj
@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>
diff --git a/lessons/Lesson_One/Program.cs b/lessons/Lesson_One/Program.cs
new file mode 100644
index 0000000..d8a32d8
--- /dev/null
+++ b/lessons/Lesson_One/Program.cs
@@ -0,0 +1,67 @@
+using System;
+
+namespace Lesson_One
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            // ========== 变量 ==========
+            int age = 25;
+            double height = 175.5;
+            string name = "无言势字幕";
+            char grade = 'A';
+            bool isActive = true;
+
+            Console.WriteLine("=== 变量 ===");
+            Console.WriteLine($"姓名: {name}");
+            Console.WriteLine($"年龄: {age}");
+            Console.WriteLine($"身高: {height}cm");
+            Console.WriteLine($"等级: {grade}");
+            Console.WriteLine($"状态: {isActive}");
+
+            // ========== var 自动推断 ==========
+            Console.WriteLine("\n=== var 自动推断 ===");
+            var message = "这是 string 类型";
+            var number = 42;  // 推断为 int
+            Console.WriteLine($"message 是: {message.GetType()}");
+            Console.WriteLine($"number 是: {number.GetType()}");
+
+            // ========== 常量 ==========
+            Console.WriteLine("\n=== 常量 ===");
+            const int MAX_RETRY = 3;
+            const string VERSION = "v1.0";
+            Console.WriteLine($"最大重试次数: {MAX_RETRY}");
+            Console.WriteLine($"版本: {VERSION}");
+
+            // ========== 类型转换 ==========
+            Console.WriteLine("\n=== 类型转换 ===");
+            int i = 10;
+            double d = i;  // 隐式转换
+            Console.WriteLine($"int -> double: {d}");
+
+            double d2 = 3.14;
+            int i2 = (int)d2;  // 显式转换
+            Console.WriteLine($"double -> int: {i2}");
+
+            string s = i.ToString();
+            Console.WriteLine($"int -> string: {s}");
+
+            int i3 = int.Parse("123");
+            Console.WriteLine($"string \"123\" -> int: {i3}");
+
+            // ========== 输入练习 ==========
+            Console.WriteLine("\n=== 输入练习 ===");
+            Console.Write("请输入你的名字: ");
+            string inputName = Console.ReadLine();
+            Console.Write($"你好, {inputName}! ");
+
+            Console.Write("请输入年龄: ");
+            string ageInput = Console.ReadLine();
+            int userAge = int.Parse(ageInput);
+            Console.WriteLine($"你 {userAge} 岁了");
+
+            Console.ReadLine();
+        }
+    }
+}
diff --git a/notes/01_CSharp_Basics.md b/notes/01_CSharp_Basics.md
new file mode 100644
index 0000000..fe94937
--- /dev/null
+++ b/notes/01_CSharp_Basics.md
@@ -0,0 +1,46 @@
+# C# 基础入门
+
+## 环境确认
+
+- .NET SDK: `dotnet --version`
+- 编辑器: VS Code + C# Dev Kit (可选) 或 Rider
+
+## 常用命令
+
+```bash
+# 创建新项目
+dotnet new console -n MyProject
+
+# 运行
+dotnet run
+
+# 构建发布
+dotnet publish -c Release
+```
+
+## 基本结构
+
+```csharp
+using System;
+
+namespace MyProject
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine("Hello, World!");
+        }
+    }
+}
+```
+
+## 关键概念
+
+| 概念 | 说明 |
+|------|------|
+| `using` | 引入命名空间，类似 Python import |
+| `namespace` | 命名空间，防止命名冲突 |
+| `class` | 类，一切皆对象 |
+| `static void Main` | 程序入口点 |
+| `Console.WriteLine` | 输出到终端 |
diff --git a/notes/02_Variables_and_Types.md b/notes/02_Variables_and_Types.md
new file mode 100644
index 0000000..ba0be51
--- /dev/null
+++ b/notes/02_Variables_and_Types.md
@@ -0,0 +1,62 @@
+# 第二课：变量和数据类型
+
+## 基本数据类型
+
+| 类型 | 说明 | 示例 |
+|------|------|------|
+| `int` | 整数 | `int age = 25;` |
+| `double` | 小数 | `double pi = 3.14;` |
+| `string` | 字符串 | `string name = "无言势";` |
+| `char` | 单字符 | `char grade = 'A';` |
+| `bool` | 布尔值 | `bool isActive = true;` |
+| `var` | 自动推断 | `var msg = "自动推断为string";` |
+
+## 声明和赋值
+
+```csharp
+// 声明 + 赋值
+int score = 100;
+
+// 先声明，后赋值
+int score;
+score = 100;
+
+// 多个变量
+int a = 1, b = 2, c = 3;
+```
+
+## 常量
+
+```csharp
+const double PI = 3.14159;  // const 声明后不可修改
+```
+
+## 类型转换
+
+```csharp
+// 隐式转换（自动）
+int i = 10;
+double d = i;  // int -> double
+
+// 显式转换（强制）
+double d = 3.14;
+int i = (int)d;  // double -> int，结果是 3
+
+// ToString / Parse
+int i = int.Parse("123");
+string s = i.ToString();
+```
+
+## 输入输出
+
+```csharp
+// 输出
+Console.WriteLine("Hello");           // 换行
+Console.Write("Hello");               // 不换行
+
+// 输入（返回 string）
+string name = Console.ReadLine();
+
+// 输入数字要转换
+int age = int.Parse(Console.ReadLine());
+```
diff --git a/notes/03_Conditions_and_Loops.md b/notes/03_Conditions_and_Loops.md
new file mode 100644
index 0000000..8354106
--- /dev/null
+++ b/notes/03_Conditions_and_Loops.md
@@ -0,0 +1,102 @@
+# 第三课：条件判断和循环
+
+## if / else 判断
+
+```csharp
+int score = 85;
+
+if (score >= 90)
+{
+    Console.WriteLine("优秀");
+}
+else if (score >= 60)
+{
+    Console.WriteLine("及格");
+}
+else
+{
+    Console.WriteLine("不及格");
+}
+
+// 三元运算符（简单判断）
+string result = score >= 60 ? "及格" : "不及格";
+```
+
+## switch 选择
+
+```csharp
+int day = 3;
+
+switch (day)
+{
+    case 1:
+        Console.WriteLine("星期一");
+        break;
+    case 2:
+        Console.WriteLine("星期二");
+        break;
+    case 3:
+        Console.WriteLine("星期三");
+        break;
+    default:
+        Console.WriteLine("其他");
+        break;
+}
+```
+
+## for 循环
+
+```csharp
+// 传统 for
+for (int i = 0; i < 5; i++)
+{
+    Console.WriteLine(i);
+}
+
+// 遍历数组
+string[] names = { "A", "B", "C" };
+for (int i = 0; i < names.Length; i++)
+{
+    Console.WriteLine(names[i]);
+}
+```
+
+## foreach 循环（更简洁）
+
+```csharp
+string[] names = { "A", "B", "C" };
+
+foreach (string name in names)
+{
+    Console.WriteLine(name);
+}
+```
+
+## while 循环
+
+```csharp
+int i = 0;
+while (i < 5)
+{
+    Console.WriteLine(i);
+    i++;
+}
+
+// 先执行再判断
+do
+{
+    Console.WriteLine(i);
+    i++;
+} while (i < 5);
+```
+
+## break 和 continue
+
+```csharp
+for (int i = 0; i < 10; i++)
+{
+    if (i == 3) continue;  // 跳过 i=3
+    if (i == 7) break;     // 退出循环
+    Console.WriteLine(i);
+}
+```
diff --git a/notes/04_Methods_and_Classes.md b/notes/04_Methods_and_Classes.md
new file mode 100644
index 0000000..65452bf
--- /dev/null
+++ b/notes/04_Methods_and_Classes.md
@@ -0,0 +1,91 @@
+# 第四课：方法（函数）和类
+
+## 方法（函数）
+
+```csharp
+// 无返回值
+void SayHello(string name)
+{
+    Console.WriteLine($"你好, {name}");
+}
+
+// 有返回值
+int Add(int a, int b)
+{
+    return a + b;
+}
+
+// 带默认参数
+void Greet(string name = "World")
+{
+    Console.WriteLine($"Hello, {name}");
+}
+```
+
+## 方法调用
+
+```csharp
+static void Main(string[] args)
+{
+    SayHello("无言势");      // 调用无返回值方法
+    int sum = Add(1, 2);   // 调用有返回值方法
+    Console.WriteLine(sum); // 输出 3
+}
+```
+
+## 类（Class）
+
+```csharp
+class Person
+{
+    // 字段（属性）
+    public string name;
+    public int age;
+
+    // 构造函数
+    public Person(string name, int age)
+    {
+        this.name = name;
+        this.age = age;
+    }
+
+    // 方法
+    public void SayHi()
+    {
+        Console.WriteLine($"我是{name}，今年{age}岁");
+    }
+}
+```
+
+## 创建对象
+
+```csharp
+static void Main(string[] args)
+{
+    Person p = new Person("无言势", 25);
+    p.SayHi();
+}
+```
+
+## 访问修饰符
+
+| 修饰符 | 访问范围 |
+|--------|----------|
+| `public` | 任何地方都能访问 |
+| `private` | 只有本类内部能访问 |
+| `internal` | 同程序集内访问 |
+
+## 静态（static）
+
+```csharp
+class MathHelper
+{
+    public static int Add(int a, int b)
+    {
+        return a + b;
+    }
+}
+
+// 调用不需要 new
+int result = MathHelper.Add(1, 2);
+```
diff --git a/notes/05_MultiFile_and_Access_Modifiers.md b/notes/05_MultiFile_and_Access_Modifiers.md
new file mode 100644
index 0000000..86f671c
--- /dev/null
+++ b/notes/05_MultiFile_and_Access_Modifiers.md
@@ -0,0 +1,114 @@
+# 第五课：多文件项目和访问修饰符
+
+## 多文件项目结构
+
+```
+Lesson05/
+├── Program.cs          // 入口，只管 Main
+├── Models/
+│   ├── Person.cs       // 数据模型
+│   └── Microphone.cs   // 麦克风类
+├── Helpers/
+│   └── MathHelper.cs   // 工具类
+└── Services/
+    └── AudioService.cs // 服务类
+```
+
+**关键规则**：
+- 同一项目内，所有 `.cs` 文件自动互相可见（不需要 import）
+- 用文件夹组织，但编译时所有文件合并成一个程序集
+
+## public vs private 核心区别
+
+| 修饰符 | 类内访问 | 类外访问 | 继承访问 |
+|--------|----------|----------|----------|
+| `public` | ✓ | ✓ | ✓ |
+| `private` | ✓ | ✗ | ✗ |
+
+```csharp
+class Person
+{
+    public string name;      // 任何地方都能读写
+    private int age;        // 只有 Person 内部能访问
+    private string secret;   // 外部无法访问
+
+    public void SetAge(int age)
+    {
+        // 公有方法内部可以访问私有字段
+        if (age > 0 && age < 150)
+            this.age = age;
+    }
+
+    public int GetAge()
+    {
+        return this.age;  // 通过方法间接访问
+    }
+}
+```
+
+```csharp
+// Program.cs
+Person p = new Person("无言势");
+p.name = "新名字";       // OK，public
+p.age = 25;             // 编译错误，private
+p.SetAge(25);           // OK，通过公有方法
+```
+
+## 为什么要 private？
+
+**数据保护**：防止无效值
+
+```csharp
+private int age;
+
+// 外部不能直接 age = -100
+// 必须通过方法验证后设置
+public void SetAge(int age)
+{
+    if (age < 0) age = 0;
+    if (age > 150) age = 150;
+    this.age = age;
+}
+```
+
+**封装**：内部实现可以随时改，不影响外部
+
+```csharp
+// 内部存储从 int 改成 DateTime 都可以
+// 只要 public 方法签名不变，外部代码不用改
+```
+
+## 其他访问修饰符
+
+| 修饰符 | 说明 |
+|--------|------|
+| `public` | 完全公开 |
+| `private` | 仅本类 |
+| `protected` | 本类 + 子类 |
+| `internal` | 同项目内 |
+
+## 属性（Property）- 介于 public/private 之间
+
+```csharp
+class Person
+{
+    private int _age;
+
+    public int Age
+    {
+        get { return _age; }           // 读取
+        set
+        {
+            if (value < 0) value = 0;  // 写入时验证
+            if (value > 150) value = 150;
+            _age = value;
+        }
+    }
+}
+```
+
+```csharp
+Person p = new Person();
+p.Age = 25;      // 自动调用 set
+int a = p.Age;   // 自动调用 get
+```
diff --git a/notes/06_Inheritance_and_Interface.md b/notes/06_Inheritance_and_Interface.md
new file mode 100644
index 0000000..21fc35d
--- /dev/null
+++ b/notes/06_Inheritance_and_Interface.md
@@ -0,0 +1,191 @@
+# 第六课：继承和接口
+
+## 继承（Inheritance）
+
+子类继承父类的属性和方法，避免重复代码。
+
+```csharp
+// 父类
+class Animal
+{
+    public string name;
+    public void Eat()
+    {
+        Console.WriteLine($"{name} 在吃东西");
+    }
+}
+
+// 子类
+class Dog : Animal
+{
+    public void Bark()
+    {
+        Console.WriteLine($"{name} 在叫: 汪汪!");
+    }
+}
+```
+
+```csharp
+Dog dog = new Dog();
+dog.name = "旺财";
+dog.Eat();   // 继承自 Animal
+dog.Bark();  // 自己独有的
+```
+
+## 方法重写（override）
+
+```csharp
+// 父类 virtual 方法
+class Animal
+{
+    public string name;
+    public virtual void Speak()
+    {
+        Console.WriteLine($"{name} 发出了声音");
+    }
+}
+
+// 子类重写
+class Cat : Animal
+{
+    public override void Speak()
+    {
+        Console.WriteLine($"{name} 喵喵喵~");
+    }
+}
+```
+
+```csharp
+Animal a = new Cat();
+a.name = "小猫";
+a.Speak();  // 输出: 小猫 喵喵喵~
+```
+
+## base 关键字
+
+子类调用父类的方法/构造函数：
+
+```csharp
+class Dog : Animal
+{
+    public string breed;
+
+    public Dog(string name, string breed) : base(name)
+    {
+        this.breed = breed;
+    }
+
+    public override void Speak()
+    {
+        base.Speak();  // 先调用父类方法
+        Console.WriteLine($"{name} 汪汪!");
+    }
+}
+```
+
+## 访问修饰符 protected
+
+| 修饰符 | 任何地方 | 继承访问 |
+|--------|----------|----------|
+| `private` | ✗ | ✗ |
+| `protected` | ✗ | ✓ |
+
+```csharp
+class Animal
+{
+    protected string name;  // private 的话子类也访问不到
+}
+
+class Dog : Animal
+{
+    public void Test()
+    {
+        name = "旺财";  // protected 可以访问
+    }
+}
+```
+
+## 接口（Interface）
+
+接口 = 约定/契约，定义必须实现的方法。
+
+```csharp
+// 定义接口
+interface IFlyable
+{
+    void Fly();           // 不写实现
+    int MaxAltitude { get; }  // 可以有属性
+}
+
+// 实现接口
+class Bird : IFlyable
+{
+    public int MaxAltitude => 1000;
+
+    public void Fly()
+    {
+        Console.WriteLine("鸟儿在飞翔");
+    }
+}
+
+class Plane : IFlyable
+{
+    public int MaxAltitude => 10000;
+
+    public void Fly()
+    {
+        Console.WriteLine("飞机在飞翔");
+    }
+}
+```
+
+## 接口 vs 继承
+
+| | 继承 | 接口 |
+|---|---|---|
+| 关键词 | `class A : B` | `class A : IB` |
+| 只能继承一个父类 | ✓ | 可以实现多个接口 |
+| 继承获得代码 | ✓ | 只获得"约定" |
+| 何时用 | 代码复用 | 约定行为 |
+
+```csharp
+// 一个类只能继承一个父类
+class Dog : Animal { }
+
+// 但可以实现多个接口
+class Duck : Animal, IFlyable, ISwimable
+{
+    public void Fly() { }
+    public void Swim() { }
+}
+```
+
+## 例子：设备驱动架构
+
+```csharp
+// 设备接口
+interface IDevice
+{
+    void Connect();
+    void Disconnect();
+    bool IsConnected { get; }
+}
+
+// 麦克风设备
+class Microphone : IDevice
+{
+    public bool IsConnected { get; private set; }
+
+    public void Connect()
+    {
+        Console.WriteLine("麦克风连接");
+        IsConnected = true;
+    }
+
+    public void Disconnect()
+    {
+        Console.WriteLine("麦克风断开");
+        IsConnected = false;
+    }
+}
+```
diff --git a/notes/07_Collections.md b/notes/07_Collections.md
new file mode 100644
index 0000000..f6323cd
--- /dev/null
+++ b/notes/07_Collections.md
@@ -0,0 +1,135 @@
+# 第七课：集合（List / Dictionary）
+
+## List<T> 动态数组
+
+`T` 是泛型，占位符，使用时替换成具体类型。
+
+```csharp
+using System.Collections.Generic;
+
+// 声明
+List<string> names = new List<string>();
+
+// 添加
+names.Add("无言势");
+names.Add("字幕");
+names.Add("工具");
+
+// 插入（指定位置）
+names.Insert(1, "新插入");
+
+// 删除
+names.Remove("字幕");
+names.RemoveAt(0);  // 按索引删除
+
+// 访问
+string first = names[0];
+
+// 数量
+int count = names.Count;
+
+// 遍历
+foreach (string name in names)
+{
+    Console.WriteLine(name);
+}
+```
+
+## 初始化器
+
+```csharp
+// 声明时直接填充
+List<string> fruits = new List<string>()
+{
+    "苹果", "香蕉", "橙子"
+};
+
+// 简写（C# 12+）
+List<string> fruits2 = ["苹果", "香蕉", "橙子"];
+```
+
+## 常用方法
+
+```csharp
+List<int> numbers = new List<int>() { 3, 1, 4, 1, 5 };
+
+numbers.Sort();              // 排序
+numbers.Reverse();           // 反转
+numbers.Contains(5);        // 是否包含
+numbers.IndexOf(4);         // 查找索引
+numbers.Clear();            // 清空
+numbers.InsertRange(0, ...); // 插入集合
+```
+
+## Dictionary<K, V> 键值对
+
+```csharp
+using System.Collections.Generic;
+
+// 声明
+Dictionary<string, int> scores = new Dictionary<string, int>();
+
+// 添加
+scores["无言势"] = 100;
+scores["玩家A"] = 85;
+scores.Add("玩家B", 90);
+
+// 访问
+int score = scores["无言势"];  // 100
+
+// 安全访问（键不存在不报错）
+scores.TryGetValue("不存在", out int value);
+
+// 是否包含键
+if (scores.ContainsKey("无言势"))
+{
+    Console.WriteLine(scores["无言势"]);
+}
+
+// 删除
+scores.Remove("玩家A");
+
+// 遍历
+foreach (KeyValuePair<string, int> kv in scores)
+{
+    Console.WriteLine($"{kv.Key}: {kv.Value}");
+}
+
+// 只遍历键或值
+foreach (string key in scores.Keys) { }
+foreach (int value in scores.Values) { }
+```
+
+## Dictionary 初始化
+
+```csharp
+// C# 6+
+Dictionary<string, int> config = new Dictionary<string, int>()
+{
+    ["sensitivity"] = 70,
+    ["volume"] = 80,
+    ["language"] = 1
+};
+```
+
+## List 和 Dictionary 在项目中的应用
+
+```csharp
+// 识别结果历史
+List<string> transcriptHistory = new List<string>();
+
+// 设备配置
+Dictionary<string, string> deviceConfig = new Dictionary<string, string>()
+{
+    ["name"] = "USB麦克风",
+    ["sampleRate"] = "16000",
+    ["channels"] = "1"
+};
+
+// 设置选项
+Dictionary<string, bool> settings = new Dictionary<string, bool>()
+{
+    ["autoConnect"] = true,
+    ["vad"] = true
+};
+```
diff --git a/notes/08_Exception_Handling.md b/notes/08_Exception_Handling.md
new file mode 100644
index 0000000..b1553fb
--- /dev/null
+++ b/notes/08_Exception_Handling.md
@@ -0,0 +1,164 @@
+# 第八课：异常处理
+
+## 什么是异常
+
+异常 = 程序运行时的错误，导致程序无法正常继续。
+
+```csharp
+int[] numbers = { 1, 2, 3 };
+int x = numbers[10];  // 索引越界 → 抛出 IndexOutOfRangeException
+```
+
+## try / catch / finally
+
+```csharp
+try
+{
+    // 可能出错的代码放这里
+    int[] numbers = { 1, 2, 3 };
+    int x = numbers[10];
+}
+catch (Exception ex)
+{
+    // 捕获异常并处理
+    Console.WriteLine($"出错了: {ex.Message}");
+}
+finally
+{
+    // 无论是否出错，都会执行（通常放清理代码）
+    Console.WriteLine("无论怎样都会执行");
+}
+```
+
+## 捕获特定异常类型
+
+```csharp
+try
+{
+    int a = int.Parse("abc");  // 格式错误
+}
+catch (FormatException ex)
+{
+    Console.WriteLine("格式错误");
+}
+catch (OverflowException ex)
+{
+    Console.WriteLine("数字溢出");
+}
+catch (Exception ex)
+{
+    Console.WriteLine($"未知错误: {ex.Message}");
+}
+```
+
+## 常见异常类型
+
+| 异常类型 | 触发场景 |
+|----------|----------|
+| `FormatException` | 格式错误（`int.Parse("abc")`） |
+| `NullReferenceException` | 空对象访问（`obj.Method()`，`obj` 为 null） |
+| `IndexOutOfRangeException` | 数组越界 |
+| `FileNotFoundException` | 文件不存在 |
+| `DivideByZeroException` | 除数为零 |
+| `InvalidOperationException` | 操作无效状态 |
+
+## throw 抛出异常
+
+```csharp
+static void SetAge(int age)
+{
+    if (age < 0 || age > 150)
+    {
+        throw new ArgumentException("年龄必须在 0-150 之间");
+    }
+    Console.WriteLine($"年龄设置为: {age}");
+}
+```
+
+```csharp
+try
+{
+    SetAge(-5);
+}
+catch (ArgumentException ex)
+{
+    Console.WriteLine($"参数错误: {ex.Message}");
+}
+```
+
+## 自定义异常
+
+```csharp
+class MicrophoneException : Exception
+{
+    public MicrophoneException(string message) : base(message) { }
+    public MicrophoneException(string message, Exception inner) : base(message, inner) { }
+}
+```
+
+## finally 的作用
+
+```csharp
+FileStream file = null;
+try
+{
+    file = new FileStream("test.txt", FileMode.Open);
+    // 读取文件...
+}
+catch (FileNotFoundException ex)
+{
+    Console.WriteLine("文件不存在");
+}
+finally
+{
+    // 确保文件被关闭
+    file?.Close();
+}
+```
+
+## using 语句（更简洁）
+
+```csharp
+// using 自动释放资源（相当于 try-finally）
+using (FileStream file = new FileStream("test.txt", FileMode.Open))
+{
+    // 使用 file
+}  // 作用域结束后自动 Close()
+```
+
+## 实际项目应用
+
+```csharp
+try
+{
+    // 尝试连接麦克风
+    microphone.Connect();
+}
+catch (DeviceNotFoundException ex)
+{
+    Console.WriteLine("麦克风未找到，请检查连接");
+    ShowReconnectDialog();
+}
+catch (UnauthorizedAccessException ex)
+{
+    Console.WriteLine("没有权限访问麦克风");
+    RequestPermission();
+}
+catch (Exception ex)
+{
+    Console.WriteLine($"未知错误: {ex.Message}");
+    LogError(ex);
+}
+```
+
+## 不要过度捕获异常
+
+```csharp
+// ✗ 不好：捕获所有异常但不处理
+try { DoSomething(); }
+catch { }
+
+// ✓ 好：只捕获能处理的异常
+try { Connect(); }
+catch (DeviceNotFoundException ex) { ShowError(); }
+```
diff --git a/notes/09_File_IO.md b/notes/09_File_IO.md
new file mode 100644
index 0000000..45eaeeb
--- /dev/null
+++ b/notes/09_File_IO.md
@@ -0,0 +1,150 @@
+# 第九课：文件读写
+
+## 基本文件操作
+
+```csharp
+using System.IO;
+
+// 写入文本
+File.WriteAllText("test.txt", "你好，无言势字幕");
+
+// 读取文本
+string content = File.ReadAllText("test.txt");
+```
+
+## 路径操作
+
+```csharp
+// 路径拼接
+string path = Path.Combine("C:", "Users", "test", "config.json");
+
+// 获取扩展名
+string ext = Path.GetExtension("test.txt");  // ".txt"
+
+// 获取文件名
+string name = Path.GetFileName("C:/test/test.txt");  // "test.txt"
+
+// 判断文件是否存在
+bool exists = File.Exists("config.json");
+```
+
+## 读取文件
+
+```csharp
+// 方式1：一次性读取（适合小文件）
+string content = File.ReadAllText("test.txt");
+
+// 方式2：按行读取
+string[] lines = File.ReadAllLines("test.txt");
+foreach (string line in lines)
+{
+    Console.WriteLine(line);
+}
+
+// 方式3：流式读取（大文件）
+using (StreamReader reader = new StreamReader("test.txt"))
+{
+    while (!reader.EndOfStream)
+    {
+        string line = reader.ReadLine();
+        Console.WriteLine(line);
+    }
+}
+```
+
+## 写入文件
+
+```csharp
+// 方式1：一次性写入
+File.WriteAllText("output.txt", "内容");
+
+// 方式2：按行写入
+string[] lines = { "第一行", "第二行", "第三行" };
+File.WriteAllLines("output.txt", lines);
+
+// 方式3：追加内容
+File.AppendAllText("log.txt", "新追加的内容\n");
+
+// 方式4：流式写入
+using (StreamWriter writer = new StreamWriter("output.txt"))
+{
+    writer.WriteLine("第一行");
+    writer.WriteLine("第二行");
+}
+```
+
+## JSON 序列化
+
+.NET 内置 JSON 支持（System.Text.Json）：
+
+```csharp
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+// 序列化（对象 -> JSON）
+class Person
+{
+    public string Name { get; set; }
+    public int Age { get; set; }
+}
+
+Person p = new Person { Name = "无言势", Age = 25 };
+string json = JsonSerializer.Serialize(p);
+Console.WriteLine(json);
+// 输出: {"Name":"无言势","Age":25}
+
+// 反序列化（JSON -> 对象）
+string jsonStr = "{\"Name\":\"玩家A\",\"Age\":30}";
+Person p2 = JsonSerializer.Deserialize<Person>(jsonStr);
+Console.WriteLine(p2.Name);  // "玩家A"
+```
+
+## 配置文件示例
+
+```csharp
+// AppSettings 类
+class AppSettings
+{
+    public int Sensitivity { get; set; } = 70;
+    public bool AutoConnect { get; set; } = true;
+    public bool VadEnabled { get; set; } = true;
+    public string Language { get; set; } = "zh-CN";
+}
+
+// 保存配置
+AppSettings settings = new AppSettings();
+string json = JsonSerializer.Serialize(settings, new JsonSerializerOptions { WriteIndented = true });
+File.WriteAllText("config.json", json);
+
+// 读取配置
+string loaded = File.ReadAllText("config.json");
+AppSettings loadedSettings = JsonSerializer.Deserialize<AppSettings>(loaded);
+```
+
+## using 语句自动关闭
+
+```csharp
+// StreamReader/Writer 必须关闭，否则文件被锁定
+using (StreamReader reader = new StreamReader("test.txt"))
+{
+    string line = reader.ReadLine();
+}
+// 作用域结束后自动 Close()
+```
+
+## 常见错误处理
+
+```csharp
+try
+{
+    string content = File.ReadAllText("notexist.txt");
+}
+catch (FileNotFoundException)
+{
+    Console.WriteLine("文件不存在");
+}
+catch (IOException ex)
+{
+    Console.WriteLine($"IO错误: {ex.Message}");
+}
+```
diff --git a/notes/10_Delegates_and_Events.md b/notes/10_Delegates_and_Events.md
new file mode 100644
index 0000000..7046f33
--- /dev/null
+++ b/notes/10_Delegates_and_Events.md
@@ -0,0 +1,182 @@
+# 第十课：委托和事件
+
+## 委托（Delegate）是什么
+
+委托 = 函数的"容器"，可以把函数当作变量传递。
+
+```csharp
+// 声明委托类型
+delegate int Calculator(int a, int b);
+
+// 定义符合委托的方法
+int Add(int a, int b) => a + b;
+int Multiply(int a, int b) => a * b;
+
+// 使用委托
+Calculator calc = Add;
+int result = calc(1, 2);  // result = 3
+
+calc = Multiply;
+result = calc(3, 4);  // result = 12
+```
+
+## 为什么需要委托
+
+```csharp
+// 场景：数组遍历时对每个元素做操作
+void ProcessNumbers(int[] numbers, ??? operation)
+{
+    foreach (int n in numbers)
+    {
+        ??? result = operation(n);
+        Console.WriteLine(result);
+    }
+}
+
+// 没有委托，你需要写多个重载
+// 有委托，可以传任意操作
+ProcessNumbers(nums, x => x * 2);      // 翻倍
+ProcessNumbers(nums, x => x + 1);      // +1
+ProcessNumbers(nums, x => x * x);      // 平方
+```
+
+## Action 和 Func（简化委托）
+
+```csharp
+// Action: 返回 void 的委托
+Action<string> print = (msg) => Console.WriteLine(msg);
+print("Hello");  // 无返回值
+
+// Func: 有返回值的委托
+Func<int, int, int> add = (a, b) => a + b;
+int result = add(1, 2);  // 3
+
+// 多参数
+Func<string, string, string> concat = (a, b) => a + b;
+string s = concat("Hello", " World");  // "Hello World"
+```
+
+## 事件（Event）是什么
+
+事件 = 委托的升级版，只能 += 添加监听，不能外部直接调用。
+
+```csharp
+class Button
+{
+    // 事件声明
+    public event Action Clicked;
+
+    public void OnClick()
+    {
+        Console.WriteLine("按钮被点击");
+        // 触发事件（只能在类内部）
+        Clicked?.Invoke();
+    }
+}
+```
+
+```csharp
+// 使用事件
+Button btn = new Button();
+
+// 添加监听者
+btn.Clicked += () => Console.WriteLine("Handler 1 执行");
+btn.Clicked += () => Console.WriteLine("Handler 2 执行");
+
+btn.OnClick();
+// 输出:
+// 按钮被点击
+// Handler 1 执行
+// Handler 2 执行
+```
+
+## 事件 + 委托的应用场景
+
+```csharp
+class Microphone
+{
+    // 事件声明
+    public event Action<string> OnTranscriptReady;  // 识别出文字时触发
+    public event Action OnListeningStarted;
+    public event Action OnListeningStopped;
+
+    private bool isListening;
+
+    public void StartListening()
+    {
+        isListening = true;
+        Console.WriteLine("麦克风开始监听...");
+        OnListeningStarted?.Invoke();
+    }
+
+    public void StopListening()
+    {
+        isListening = false;
+        Console.WriteLine("麦克风停止监听...");
+        OnListeningStopped?.Invoke();
+    }
+
+    // 模拟识别到文字
+    public void TranscriptDetected(string text)
+    {
+        Console.WriteLine($"识别到: {text}");
+        OnTranscriptReady?.Invoke(text);  // 触发事件，通知所有监听者
+    }
+}
+```
+
+```csharp
+// 使用
+Microphone mic = new Microphone();
+
+// 订阅事件
+mic.OnTranscriptReady += (text) =>
+{
+    Console.WriteLine($"收到文字: {text}");
+};
+
+mic.OnListeningStarted += () =>
+{
+    Console.WriteLine("开始记录...");
+};
+
+mic.OnListeningStopped += () =>
+{
+    Console.WriteLine("停止记录");
+};
+
+// 触发
+mic.StartListening();
+mic.TranscriptDetected("今天天气不错");
+mic.TranscriptDetected("大家一起加油");
+mic.StopListening();
+```
+
+## 事件 vs 委托
+
+| | 委托 | 事件 |
+|---|---|---|
+| 外部添加监听 | ✓ | ✓ |
+| 外部调用 | ✓ | ✗ |
+| 主要用途 | 传递函数 | 通知机制 |
+
+## 移除监听
+
+```csharp
+Action handler = () => Console.WriteLine("Handler");
+
+btn.Clicked += handler;
+btn.Clicked -= handler;  // 移除
+```
+
+## 实际项目结构
+
+```
+语音识别服务
+    ├── OnTranscriptReady(text)      → UI 更新文字
+    ├── OnListeningStarted()          → UI 显示监听状态
+    ├── OnListeningStopped()          → UI 停止动画
+    └── OnError(error)               → UI 显示错误
+```
+
+事件让各部分解耦，不需要互相引用。
diff --git a/notes/11_WebView2_Basics.md b/notes/11_WebView2_Basics.md
new file mode 100644
index 0000000..0010f00
--- /dev/null
+++ b/notes/11_WebView2_Basics.md
@@ -0,0 +1,121 @@
+# WebView2 入门
+
+## 什么是 WebView2
+
+在 Windows 桌面应用里嵌入 Chrome 内核浏览器。
+
+```
+┌─────────────────────────┐
+│     WPF / WinForms      │
+│  ┌───────────────────┐  │
+│  │   WebView2        │  │
+│  │  (Chrome 内核)    │  │
+│  │                   │  │
+│  │  ┌─────────────┐  │  │
+│  │  │  HTML/CSS/JS │  │  │
+│  │  │  你的界面    │  │  │
+│  │  └─────────────┘  │  │
+│  └───────────────────┘  │
+│                         │
+│   C# 代码              │
+└─────────────────────────┘
+```
+
+## 安装 WebView2 Runtime
+
+下载地址：https://developer.microsoft.com/en-us/microsoft-edge/webview2/
+
+## NuGet 包
+
+```bash
+dotnet add package Microsoft.Web.WebView2
+```
+
+## XAML 使用
+
+```xml
+<Window xmlns:wv2="clr-namespace:Microsoft.Web.WebView2.Wpf;assembly=Microsoft.Web.WebView2.Wpf">
+    <Grid>
+        <wv2:WebView2 x:Name="WebView"
+                      Source="https://example.com"/>
+    </Grid>
+</Window>
+```
+
+## 初始化
+
+```csharp
+private async void InitializeWebView()
+{
+    await WebView.EnsureCoreWebView2Async();
+    Console.WriteLine("WebView2 初始化成功");
+}
+```
+
+## C# 调用 JS
+
+```csharp
+// 执行 JS
+await WebView.ExecuteScriptAsync("alert('Hello from C#')");
+
+// 获取返回值
+string result = await WebView.ExecuteScriptAsync("document.title");
+```
+
+## JS 调用 C#
+
+```csharp
+// C# 注册方法
+WebView.CoreWebView2.WebMessageReceived += (s, e) =>
+{
+    string message = e.TryGetWebMessageAsString();
+    Console.WriteLine($"收到JS消息: {message}");
+};
+```
+
+```javascript
+// JS 发送消息
+window.chrome.webview.postMessage("Hello from JS");
+```
+
+## 常用操作
+
+```csharp
+WebView.Reload();                    // 刷新
+WebView.GoBack();                    // 后退
+WebView.GoForward();                 // 前进
+WebView.Navigate("https://...");    // 导航到 URL
+WebView.CoreWebView2.Settings      // 配置
+```
+
+## 本地 HTML
+
+```csharp
+// 加载本地 HTML 文件
+string htmlPath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "index.html");
+WebView.CoreWebView2.Navigate(new Uri(htmlPath).AbsoluteUri);
+
+// 或者直接加载 HTML 字符串
+string html = "<h1>Hello</h1>";
+WebView.NavigateToString(html);
+```
+
+## 项目里怎么用
+
+```
+无言势字幕/
+├── MainWindow.xaml      ← WPF 窗口，放 WebView2
+├── index.html          ← 你的界面（HTML/CSS/JS）
+├── WebViewManager.cs   ← C# 和 JS 通信
+└── AsrService.cs       ← 语音识别服务
+```
+
+C# 负责：
+- 语音识别（Sherpa-ONNX）
+- OSC 发送
+- 窗口管理
+
+HTML/JS 负责：
+- 界面显示
+- 动画效果
+- 用户交互
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