private void OnShowToolWindow1(object sender, RoutedEventArgs e)
{
var toolWindow1 = dockManager.Layout.Descendents().OfType<LayoutAnchorable>().Single(a => a.ContentId == "toolWindow1");
if (toolWindow1.IsHidden)
toolWindow1.Show();
else if (toolWindow1.IsVisible)
toolWindow1.IsActive = true;
else
toolWindow1.AddToLayout(dockManager, AnchorableShowStrategy.Bottom | AnchorableShowStrategy.Most);
}