protected override void OnRender(DrawingContext drawingContext)
{
base.OnRender(drawingContext);
Axises.Height = ActualHeight;
Axises.Width = ActualWidth;
Axises.InvalidateVisual();
MyCanvas.InvalidateVisual();
MyCanvas.Children.Add(new Rectangle {
Width = ActualWidth, Height = ActualHeight, Fill = new SolidColorBrush(Colors.Transparent)
});
Drawer.Draw();
Console.WriteLine("OnRender");
}