using System;using System.Collections.Generic;using System.Linq;using System.Security.Cryptography;using System.Text;using System.Threading.Tasks;namespace _01MD5加密{    class Program    {        static void Main(string[] args)        {            //woaini  woaini            //202cb962ac59075b964b07152d234b70           // string s = GetMD5("123");            //202cb962ac59075b964b07152d234b70            //202cb962ac59075b964b07152d234b70            //202cb962ac5975b964b7152d234b70            //3244185981728979115075721453575112            //Console.WriteLine(s);            //Console.ReadKey();            //double n = 123.456;            //Console.WriteLine(n.ToString("C"));            //Console.ReadKey();        }        public static string GetMD5(string str)        {            //创建MD5对象            MD5 md5 = MD5.Create();            //开始加密            //需要将字符处转换成字节数组            byte[] buffer = Encoding.GetEncoding("GBK").GetBytes(str);            //返回一个加密好的字节数组            byte[] MD5Buffer = md5.ComputeHash(buffer);            //将字节数组转换成字符串            //字节数组---字符串            //将字节数组中每个元素按照指定的编码格式解析成字符串            //直接将数组ToString();            //将字节数组中的每个元素ToString()          //  return Encoding.GetEncoding("GBK").GetString(MD5Buffer);            // 189 273 345 我爱你            // 189 273 345            string strNew = "";            for (int i = 0; i < MD5Buffer.Length; i++)            {                strNew += MD5Buffer[i].ToString("x2");            }            return strNew;        }    }}