private void addMemberButton_Click(object sender, RoutedEventArgs e)
 {
     DataContext  = new AddMemberUserControl();
     this.Content = new AddMemberUserControl();
 }
 private void click_AddMembers(object sender, MouseButtonEventArgs e)
 {
     DataContext  = new AddMemberUserControl(MaCD);
     this.Content = new AddMemberUserControl(MaCD);
 }