Question

There is function in which a new window is opened and shown. I want to put a condition onto the closure of that window. I wrote what I want as a pseudo-code below.

private void fnc (object sender, RoutedEventArgs e)
{
    MyWindow nw = new MyWindow();

    nw.Show();

    // Pseudo code: When (nw.Close()) {do something}
}

Answer 1

private void fnc (object sender, RoutedEventArgs e)
{
    MyWindow nw = new MyWindow();

    nw.Show();

    // inline
    nw.Closed += (s1, e1) => Debug.WriteLine("Closed");

    // or
    nw.Closed += (s1, e1) =>
                        {
                            Debug.WriteLine("Closed");

                        };

    // or
    w.Closed += OnWindowClosed;
}

private void OnWindowClosed(object s, EventArgs e)
{
    Debug.WriteLine("Closed");
}