Unicode有四种编码格式，UTF-8, UTF-16,UTF-32,UTF-7。

字符编码类,ASCIIEncoding ,UTF7Encoding,UnicodeEncoding,UTF32Encoding。

复制代码 代码如下:

using System.Collections.Generic;

using System.Text;

namespace AsciiEncodingDemo

{

class Program

{

static void Main(string[] args)

{

ASCIIEncoding myAscii = new ASCIIEncoding();

string unicodeStr = "ASCII Encoding Demo";

Console.WriteLine(unicodeStr);

//下面的代码将对unicodeStr字符串的内容进行编码。

Byte[] encodeBytes = myAscii.GetBytes(unicodeStr);

Console.WriteLine("编码后的字符串：");

foreach (byte c in encodeBytes)

{

Console.Write("[{0}]", c);

}

Console.WriteLine("");

Console.WriteLine("解码后的字符串：");

//下面的语句将对encodeBytes字节数组的内容进行解码

string decodeStr = myAscii.GetString(encodeBytes);

Console.WriteLine(decodeStr);

Console.ReadLine();

}

}

}