c#中的编码转化

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Runtime.Serialization.Formatters.Binary;using System.IO;namespace Model{    public class UDPComm    {        //编码        public static byte[] EncodingASCII(string buf)        {            byte[] data = Encoding.Unicode.GetBytes(buf);            return data;        }        //解码        public static string DecodingASCII(byte[] bt)        {            string st = Encoding.Unicode.GetString(bt);            return st;        }        //编码        public static byte[] EncodingUTF_8(string buf)        {            byte[] data = Encoding.UTF8.GetBytes(buf);            return data;        }        //编码        public static string DecodingUTF_8(byte[] bt)        {            string st = Encoding.UTF8.GetString(bt);            return st;        }           }}