static void Main() { // Open file to which encrypted string is written string toEncrypt = "Selected site is in Italy."; FileStream fs = null; try { fs = new FileStream(@"\corecsharp\data\testcrypt.txt", FileMode.Create, FileAccess.Write); MyApp.WriteEncrypt(fs, toEncrypt); fs = new FileStream(@"\corecsharp\data\testcrypt.txt", FileMode.Open, FileAccess.Read); string msg = MyApp.ReadEncrypt(fs); Console.WriteLine(msg); } catch (Exception ex) { Console.WriteLine(ex.Message); } fs.Close(); Console.Read(); }