public static string GetMd5Hash(string input)
{
    MD5 md5Hash = MD5.Create();
    // Convert the input string to a byte array and compute the hash.
    byte[] data =http://www.mamicode.com/ md5Hash.ComputeHash(Encoding.UTF8.GetBytes(input));
    StringBuilder sBuilder = new StringBuilder();
    for (int i = 0; i < data.Length; i++)
    {
        sBuilder.Append(data[i].ToString("x2"));
    }
    return sBuilder.ToString();
}