Base64加密解密的方法

using System;
using System.Text;

namespace Common
{
    public class EncodeandDecode
    {
        public string Encode(string str)
        {
            byte[] encbuff = System.Text.Encoding.UTF8.GetBytes(str);
            return Convert.ToBase64String(encbuff);
        }

        public string Decode(string str)
        {
            byte[] decbuff = Convert.FromBase64String(str);
            return System.Text.Encoding.UTF8.GetString(decbuff);
        }
        static void Main(string[] args)
        {
            string aa = String.Empty;
            string bb = String.Empty;
            EncodeandDecode encodeandDecode = new EncodeandDecode();
            aa = encodeandDecode.Encode("徐龙");
            bb = encodeandDecode.Decode(aa);
        }
    }

}

　最简单的Base64加密解密的方法