EncrypterAndDecrypter.DecryptQryParam Method

public static string DecryptQryParam(string input)
 {
     input = input.Replace("~", "+").Replace("^", "/");
     RijndaelManaged RijndaelCipher = new RijndaelManaged();
     string DecryptedData = null;
     try
     {
         byte[] EncryptedData = Convert.FromBase64String(input);
         byte[] Salt = Encoding.ASCII.GetBytes(password.Length.ToString());
         PasswordDeriveBytes SecretKey = new PasswordDeriveBytes(password, Salt);
         ICryptoTransform Decryptor = RijndaelCipher.CreateDecryptor(SecretKey.GetBytes(32),
             SecretKey.GetBytes(16));
         MemoryStream memoryStream = new MemoryStream(EncryptedData);
         CryptoStream cryptoStream = new CryptoStream(memoryStream,
             Decryptor,
             CryptoStreamMode.Read);
         byte[] PlainText = new byte[(EncryptedData.Length)];
         int DecryptedCount = cryptoStream.Read(PlainText, 0, PlainText.Length);
         memoryStream.Close();
         cryptoStream.Close();
         DecryptedData = Encoding.Unicode.GetString(PlainText, 0,
             DecryptedCount);
     }
     catch { DecryptedData = input; }
     return DecryptedData;
 }