MD5值计算

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Security.Cryptography;
using System.IO;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string f = @"C:\DTEXT23\BIN\CGMZV.DLL";
            MD5 md5 = MD5.Create();
            StringBuilder sb = new StringBuilder();

            using (FileStream fs = File.Open(f, FileMode.Open))
            {
                foreach (byte b in md5.ComputeHash(fs))
                    sb.Append(b.ToString("x2").ToLower());
            }

            Console.WriteLine("MD5校验码: {0}", sb.ToString());
            Console.Read();

        }
    }
}

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 string passWordString = FormsAuthentication.HashPasswordForStoringInConfigFile(Login1.Password, "MD5");