C#关于MD5加密问题

楼上的方法很好。
另外，MD5的加密解密使用测试程序如下。要复杂点的加密程序给我发邮件。我的邮箱：nay6@163.com

using System;
using System.Security.Cryptography;
using System.Text;

namespace ConsoleApplicationTest
{
///

/// MD5 加密解密
///

class MyTest_0609_MD5
{ // Hash an input string and return the hash as
// a 32 character hexadecimal string.
static string getMd5Hash(string input)
{
// Create a new instance of the MD5CryptoServiceProvider object.
MD5 md5Hasher = MD5.Create();

// Convert the input string to a byte array and compute the hash.
byte[] data = md5Hasher.ComputeHash(Encoding.Default.GetBytes(input));

// Create a new Stringbuilder to collect the bytes
// and create a string.
StringBuilder sBuilder = new StringBuilder();

// Loop through each byte of the hashed data
// and format each one as a hexadecimal string.
for (int i = 0; i < data.Length; i++)
{
sBuilder.Append(data[i].ToString("x2"));
}

// Return the hexadecimal string.
return sBuilder.ToString();
}

// Verify a hash against a string.
static bool verifyMd5Hash(string input, string hash)
{
// Hash the input.
string hashOfInput = getMd5Hash(input);

// Create a StringComparer an comare the hashes.
StringComparer comparer = StringComparer.OrdinalIgnoreCase;

if (0 == comparer.Compare(hashOfInput, hash))
{
return true;
}
else
{
return false;
}
}

static void Main()
{
string source = "Hello World!";

string hash = getMd5Hash(source);

Console.WriteLine("The MD5 hash of " + source + " is: " + hash + ".");

Console.WriteLine("Verifying the hash...");

if (verifyMd5Hash(source, hash))
{
Console.WriteLine("The hashes are the same.");
}
else
{
Console.WriteLine("The hashes are not same.");
}
Console.Read();
}
}
}