简单md5加密

using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string s = getMD5("123");
            Console.WriteLine("{0}",s);
            Console.ReadKey();
        }
        public static string getMD5(string str)
        {
            MD5 md = MD5.Create();
           //将字符转换成字节数组
            byte[] buffer=Encoding.Default.GetBytes(str);
            //返回加密好的字节数组
            byte[] mdbuffer=md.ComputeHash(buffer);
            //转换字节数组为字符串
            //1、将字节数组的每个元素按照指定编码格式解析成字符串
            //Encoding.GetEncoding("utf-8").GetString(mdbuffer);
            //2.将每个元素都Tostring
            string Tostr = "";
            for (int i = 0; i < mdbuffer.Length; i++)
            {
                //将十进制转换成16进制
                Tostr += mdbuffer[i].ToString("x");
            }
            return Tostr;
        }     

    }
}