private void MenuItem_Click_1(object sender, RoutedEventArgs e)
        {
            AddNewCollection addNewCollection = new AddNewCollection(this);

            addNewCollection.Owner = this;
            addNewCollection.ShowDialog();
        }
 private void Button_Click_1(object sender, RoutedEventArgs e)
 {
     AddNewCollection addCollection = new AddNewCollection(this);
     addCollection.Owner = this;
     addCollection.ShowDialog();
 }