protected override void HideWindowCore()

in src/dotnet/JetBrains.PresentationAssistant/FadingWpfPopupWindow.cs [37:50]

• 13 lines of code
• 1 McCabe index (conditional complexity)

        protected override void HideWindowCore()
        {
            var animation = new DoubleAnimation(0, Duration);

            EventHandler handler = null;
            handler = (s, e) =>
            {
                window.Hide();
                FireClosed();
                animation.Completed -= handler;
            };
            animation.Completed += handler;
            window.BeginAnimation(UIElement.OpacityProperty, animation);
        }