using System.Text;

// 獲取 UTF-8 編碼實(shí)例
Encoding utf8Encoding = Encoding.UTF8;

// 獲取 ASCII 編碼實(shí)例
Encoding asciiEncoding = Encoding.ASCII;

// 獲取 Unicode 編碼實(shí)例
Encoding unicodeEncoding = Encoding.Unicode;

// 通過(guò)GetEncoding 獲取 GB2312 編碼實(shí)例
Encoding gb2312 = Encoding.GetEncoding("GB2312");

// 獲取 GBK 編碼（代碼頁(yè) 936）
Encoding gbk = Encoding.GetEncoding(936);

// 列出所有支持的編碼
foreach (EncodingInfo ei in Encoding.GetEncodings())
{
    Console.WriteLine($"名稱(chēng): {ei.Name}, 描述: {ei.DisplayName}");
}

static void Main(string[] args)
{
    // 獲取 UTF-8 編碼實(shí)例
    Encoding utf8Encoding = Encoding.UTF8;          
    Console.WriteLine(utf8Encoding.HeaderName);     //輸出：utf-8
    Console.WriteLine(utf8Encoding.EncodingName);   //輸出：Unicode (UTF-8)
    Console.WriteLine(utf8Encoding.BodyName);       //輸出：utf-8
    Console.WriteLine(utf8Encoding.WebName);        //輸出：utf-8
    // 獲取編碼的代碼頁(yè)標(biāo)識(shí)符
    Console.WriteLine(utf8Encoding.CodePage);       //輸出：65001
}

internal class Program
{
    static void Main(string[] args)
    {
        string text = "Hello, World!";
        // 使用UTF-8編碼
        byte[] utf8Bytes = Encoding.UTF8.GetBytes(text);

        // 使用UTF-16編碼
        byte[] utf16Bytes = Encoding.Unicode.GetBytes(text);

        // 使用ASCII編碼
        byte[] asciiBytes = Encoding.ASCII.GetBytes(text);

        Console.WriteLine("UTF-8 Encoded Bytes: " + BitConverter.ToString(utf8Bytes));
        Console.WriteLine("UTF-16 Encoded Bytes: " + BitConverter.ToString(utf16Bytes));
        Console.WriteLine("ASCII Encoded Bytes: " + BitConverter.ToString(asciiBytes));
    }
}

// 使用 UTF-8 解碼
string decodedTextUTF8 = utf8Encoding.GetString(utf8Bytes);	//輸出：Hello, World!

// 使用 ASCII 解碼
string decodedTextASCII = asciiEncoding.GetString(asciiBytes);//輸出：Hello, World!

// 使用 Unicode 解碼
string decodedTextUnicode = unicodeEncoding.GetString(unicodeBytes);//輸出：Hello, World!

using System;
using System.Text;
class Program
{
    static void Main()
    {
        string originalText = "Hello, World!";
        // 將字符串編碼為UTF-8
        Encoding utf8 = Encoding.UTF8;
        byte[] utf8Bytes = utf8.GetBytes(originalText);
        
        Encoding utf16 = Encoding.Unicode;
        
        // 將UTF-8編碼的字節(jié)數(shù)組轉(zhuǎn)換為UTF-16
        byte[] utf16Bytes = Encoding.Convert(utf8, utf16, utf8Bytes);
        
        // 解碼UTF-16字節(jié)數(shù)組
        string convertedText = utf16.GetString(utf16Bytes);
        Console.WriteLine("Converted Text: " + convertedText);
    }
}

using System;
using System.Text;

namespace EncodingExample
{
    class Program
    {
        static void Main(string[] args)
        {
            string text = "Hello, World! 你好，世界！";

            // 獲取不同的編碼實(shí)例
            Encoding utf8Encoding = Encoding.UTF8;
            Encoding asciiEncoding = Encoding.ASCII;
            Encoding unicodeEncoding = Encoding.Unicode;

            // 將字符串編碼為字節(jié)數(shù)組
            byte[] utf8Bytes = utf8Encoding.GetBytes(text);
            byte[] asciiBytes = asciiEncoding.GetBytes(text);
            byte[] unicodeBytes = unicodeEncoding.GetBytes(text);

            // 輸出字節(jié)數(shù)組
            Console.WriteLine("UTF-8 編碼字節(jié)數(shù)組:");
            foreach (byte b in utf8Bytes)
            {
                Console.Write(b + " ");
            }
            Console.WriteLine();

            Console.WriteLine("ASCII 編碼字節(jié)數(shù)組:");
            foreach (byte b in asciiBytes)
            {
                Console.Write(b + " ");
            }
            Console.WriteLine();

            Console.WriteLine("Unicode 編碼字節(jié)數(shù)組:");
            foreach (byte b in unicodeBytes)
            {
                Console.Write(b + " ");
            }
            Console.WriteLine();

            // 將字節(jié)數(shù)組解碼為字符串
            string decodedTextUTF8 = utf8Encoding.GetString(utf8Bytes);
            string decodedTextASCII = asciiEncoding.GetString(asciiBytes);
            string decodedTextUnicode = unicodeEncoding.GetString(unicodeBytes);

            // 輸出解碼后的字符串
            Console.WriteLine("UTF-8 解碼字符串: " + decodedTextUTF8);
            Console.WriteLine("ASCII 解碼字符串: " + decodedTextASCII);
            Console.WriteLine("Unicode 解碼字符串: " + decodedTextUnicode);
        }
    }
}

using System;
using System.Text;

public class EncodingDemo 
{
    public static void Main() 
    {
        // 示例：UTF-8 轉(zhuǎn) GBK
        string text = "編碼轉(zhuǎn)換測(cè)試";
        Encoding utf8 = Encoding.UTF8;
        Encoding gbk = Encoding.GetEncoding("GBK");

        byte[] utfBytes = utf8.GetBytes(text);
        byte[] gbkBytes = Encoding.Convert(utf8, gbk, utfBytes);

        string decodedText = gbk.GetString(gbkBytes);
        Console.WriteLine($"解碼結(jié)果：{decodedText}");
    }
}

public static Encoding DetectFileEncoding(string path) 
{
    byte[] bom = new byte[4];
    using (var file = new FileStream(path, FileMode.Open)) 
    {
        file.Read(bom, 0, 4);
    }
    if (bom[0] == 0xEF && bom[1] == 0xBB && bom[2] == 0xBF) return Encoding.UTF8;
    if (bom[0] == 0xFF && bom[1] == 0xFE) return Encoding.Unicode;
    return Encoding.Default; // 無(wú) BOM 時(shí)回退到默認(rèn)編碼
}

// 發(fā)送端
string message = "傳輸數(shù)據(jù)";
byte[] buffer = Encoding.UTF8.GetBytes(message);
socket.Send(buffer);

// 接收端
byte[] buffer = new byte[1024];
int bytesRead = socket.Receive(buffer);
string received = Encoding.UTF8.GetString(buffer, 0, bytesRead);

internal class Program
{
    static void Main(string[] args)
    {
        string text = "Hello, 張三! ";
        // 使用UTF-8編碼
        byte[] utf8Bytes = Encoding.UTF8.GetBytes(text);

        // 但是使用 ASCII 解碼，會(huì)導(dǎo)致亂碼
        string decodedTextUTF8 = Encoding.ASCII.GetString(utf8Bytes);
        Console.WriteLine($"{decodedTextUTF8}");    //輸出：Hello, ??????!
    }
}