private void ZoomCanvas_MouseRightUp(object sender, MouseButtonEventArgs e)
{
ZoomCanvas.MouseLeftButtonUp -= ZoomCanvas_MouseLeftButtonUp;
ZoomCanvas.MouseMove -= ZoomCanvas_MouseMove;
ZoomCanvas.MouseRightButtonUp -= ZoomCanvas_MouseRightUp;
ClearAuxiliaryLine();
ZoomCanvas.Cursor = Cursors.Arrow;
_curSelectDot.DestroyDot();
}