title: Disposing controls created in xaml
body: <p>How are controls created by XAML code disposed in WinRT? I have created <code>ImageSlideShow</code> UserControl which uses <code>SempahoreSlim</code> and <code>DispatcherTimer</code> ( i use timer.Tick event). Should I add .Unloaded event handler to <code>ImageSlideShow</code> user control or implement IDisposable (does xaml takes care of calling .Dispose?) to release resources and events handlers - or do I need to dispose it manually like controls created in code-behind?</p>