MD5String

public static string MD5String(string value)
        {
            System.Security.Cryptography.MD5 md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
            byte[] data = Encoding.Default.GetBytes(value);
            byte[] md5Data = md5.ComputeHash(data);
            md5.Clear();
            string result = "";
            for (int i = 0; i < md5Data.Length; i++)
            {
                result += md5Data[i].ToString("x").PadLeft(2, '0');
            }
            return result;
        }