C#实现MD5加密

public class MD5Str
{
/// <summary>
/// 字符串MD5加密
/// </summary>
/// <param name="Text">要加密的字符串</param>
/// <returns>密文</returns>
public static string MD5(string Text)
{
byte[] buffer = System.Text.Encoding.Default.GetBytes(Text);
try
{
System.Security.Cryptography.MD5CryptoServiceProvider check;
check = new System.Security.Cryptography.MD5CryptoServiceProvider();
byte[] somme = check.ComputeHash(buffer);
string ret = "";
foreach (byte a in somme)
{
if (a < 16)
ret += "0" + a.ToString("X");
else
ret += a.ToString("X");
}
return ret.ToLower();
}
catch
{
throw;
}
}
}

static void Main(string[] args)
{
string data = "123456789";  //要加密的数据
string encodeStr = "";   //加密后文本

encodeStr = MD5Str.MD5(data);

Console.WriteLine("原文本：{0}", data);
Console.WriteLine("加密后文本：{0}", encodeStr);
Console.Read();
}