public class Crypto  {      SymmetricAlgorithm mCSP;      #region "Constants"      const string _key = "NYYObMInlTtentKODigMiSE/NSp/4JQv";      const string _IV = "PenS8UCVF7s=";      #endregion      public Crypto()      {          mCSP = SetEnc();          mCSP.IV = Convert.FromBase64String(_IV);          mCSP.Key = Convert.FromBase64String(_key);      }      public string EncryptString(string Value)      {          ICryptoTransform ct;          MemoryStream ms;          CryptoStream cs;          Byte[] byt = new byte[64];            try          {              ct = mCSP.CreateEncryptor(mCSP.Key, mCSP.IV);                byt = Encoding.UTF8.GetBytes(Value);                ms = new MemoryStream();              cs = new CryptoStream(ms, ct, CryptoStreamMode.Write);              cs.Write(byt, 0, byt.Length);              cs.FlushFinalBlock();                cs.Close();                return Convert.ToBase64String(ms.ToArray());          }          catch (Exception Ex)          {              throw (new Exception("An error occurred while encrypting string", Ex));          }      }      public string DecryptString(string Value)      {          ICryptoTransform ct;          MemoryStream ms;          CryptoStream cs;          Byte[] byt = new byte[64];          try          {              ct = mCSP.CreateDecryptor(mCSP.Key, mCSP.IV);                byt = Convert.FromBase64String(Value);                ms = new MemoryStream();              cs = new CryptoStream(ms, ct, CryptoStreamMode.Write);              cs.Write(byt, 0, byt.Length);              cs.FlushFinalBlock();                cs.Close();              string test = Encoding.UTF8.GetString(ms.ToArray());              return Encoding.UTF8.GetString(ms.ToArray());          }          catch (Exception ex)          {              throw (new Exception("An error occurred while decrypting string", ex));          }      }      private SymmetricAlgorithm SetEnc()      {          return new TripleDESCryptoServiceProvider();      }  }