How to override default window close operation?

Question

In WPF I want to change default close behaviour of some window, so that when user clics red close button the window does not close, it merely hides (and call some method as

Answer 1

Try overriding OnClosing in Window.xaml.cs

private override void OnClosing( object sender, CancelEventArgs e )
{
     e.Cancel = true;
     //Do whatever you want here..
}