private void Button_Click_Save1(object sender, RoutedEventArgs e)
 {
     if (!String.IsNullOrEmpty(TextDeshifr.Text))
     {
         WorkWithFile.SaveFile(TextDeshifr.Text);
         TextDeshifr.Clear();
     }
     else
     {
         MessageBox.Show("Нечего сохранять");
     }
 }
        private void Button_Click_Read(object sender, RoutedEventArgs e)
        {
            var result = VigenereDeshifr.Deshifr(WorkWithFile.ReadFile(), "скорпион");

            TextDeshifr.Text = result;
        }