public void ShowSelection()
{
var desktop = GuiManager.Screen.Desktop;
if (SelectionWindow.ClassList.Items.Count > 0 && SelectionWindow.ClassList.SelectedItems.Count == 0)
{
SelectionWindow.ClassList.SelectItem(0);
}
SelectionWindow.LayoutFlags = ControlLayoutFlags.Center;
desktop.Children.Add(SelectionWindow);
SelectionWindow.Update();
desktop.UpdateLayout();
}