private static string HashString(string Value)
        {
            MD5CryptoServiceProvider provider = new MD5CryptoServiceProvider();
            byte[] bytes = Encoding.ASCII.GetBytes(Value);
            bytes = provider.ComputeHash(bytes);
            string str = "";
            for (int i = 0; i < bytes.Length; i++)
            {
                str = str + bytes[i].ToString("x2").ToLower();
            }
            return str;
        }