private void previousWindowButton_Click(object sender, RoutedEventArgs e)
 {
     NewRollNoEntryWindow main = new NewRollNoEntryWindow();
     main.Show();
     this.Close();
 }
 private void NewRollNoEntry_Click(object sender, RoutedEventArgs e)
 {
     NewRollNoEntryWindow main = new NewRollNoEntryWindow();
     main.Show();
     //this.Close();
 }