C#调用MD5算法就是这么简单！

using System.Security.Cryptography;

private static string MD5ToString(String argString)
{
  MD5 md5 = new MD5CryptoServiceProvider();
  byte[] data = System.Text.Encoding.Default.GetBytes(argString);
  byte[] result = md5.ComputeHash(data);
  String strReturn = String.Empty;
  for (int i = 0; i < result.Length; i++)
      strReturn += result[i].ToString("x").PadLeft(2, '0');
  return strReturn;
}

返回的结果就是经md5加密后的结果了！