WPF->Parent and child Form

Question

Hello,

 

On One.xaml ,I create a Menu,And I want to open other form on clicking on Submemu item.Both form are work as parent child form.

How we set here child and parent form.

I dont want to use WPF.MDI.dll because their is assembly reference error.

I use following code but it not work properly

 

   private void Member_Click(object sender, RoutedEventArgs e)
{
MemberDetails MemberRegi = new MemberDetails();//Member details is child form
MemberRegi.ShowInTaskbar = false;
MemberRegi.Owner = Application.Current.MainWindow;
MemberRegi.ShowDialog();
}

when i click on Submenu of parent form then Member_click event is occur.