using System.Security.Cryptography;

using System.Text;

using System.Configuration;

using System;

public static class Security

    {

        public static string AESIV =  ConfigurationManager.AppSettings["IV"];

        public static string AESKey = ConfigurationManager.AppSettings["Key"];

        public static string AESEncrypt(string input)

        {

            try

            {

                var rijndaelCipher = new RijndaelManaged

                {

                    Mode = CipherMode.CBC,

                    Padding = PaddingMode.PKCS7,

                    KeySize = 128,

                    BlockSize = 128

                };

                byte[] keyBytes = Encoding.UTF8.GetBytes(AESKey);

                rijndaelCipher.Key = keyBytes;

                byte[] ivBytes = Encoding.UTF8.GetBytes(AESIV);

                rijndaelCipher.IV = ivBytes;

                ICryptoTransform transform = rijndaelCipher.CreateEncryptor();

                byte[] plainText = Encoding.UTF8.GetBytes(input);

                byte[] cipherBytes = transform.TransformFinalBlock(plainText, 0, plainText.Length);

                return Convert.ToBase64String(cipherBytes);

            }

            catch (Exception ex)

            {

                return string.Empty;

            }

        }

    }