private static RNGCryptoServiceProvider rngCsp = new RNGCryptoServiceProvider();
        public static string IV = "mvi4j0r32sdf4gj8"; // 16 chars = 128 bits
        public static string Key = "h564j9z4j5h4j6z48g68h4j8gz84jz8g"; // 32 chars = 256 bits
        byte[] IVrandom = new byte[16];


        public static string Encrypt(string decrypted)
        {
            byte[] IVrandom = new byte[16];

            byte[] textbytes = ASCIIEncoding.ASCII.GetBytes(decrypted);
            AesCryptoServiceProvider encdec = new AesCryptoServiceProvider();
            encdec.BlockSize = 128;
            encdec.KeySize = 256;
            encdec.Key = ASCIIEncoding.ASCII.GetBytes(Key);
            encdec.IV = ASCIIEncoding.ASCII.GetBytes(IV);
            encdec.Padding = PaddingMode.PKCS7;
            encdec.Mode = CipherMode.CBC;

            ICryptoTransform icrypt = encdec.CreateEncryptor(encdec.Key, encdec.IV);

            byte[] enc = icrypt.TransformFinalBlock(textbytes, 0, textbytes.Length);
            icrypt.Dispose();

            return Convert.ToBase64String(enc);
        }