private void Initialize()
{
MainWindow = new StudioWindow(this);
_mainSite = MainWindow.MainSite;
// Initialize Composition Host
Host.InitiailizeComposition(this);
// Initialize main sites
MainSiteManager.Instance().InitializeMainSite(this);
// Initialize left panels
LeftPanelManager.Instance().InitializeLeftPanels(this, MainWindow.LeftPanelsContainer);
MainWindow.Show();
}