private void SecondPicture_PreviewMouseUp(object sender, MouseButtonEventArgs e)
{
_movePoint2 = null;
SecondPicture.ReleaseMouseCapture();
}
private void SecondPicture_PreviewMouseDown(object sender, MouseButtonEventArgs e)
{
_movePoint2 = e.GetPosition(SecondPicture);
SecondPicture.CaptureMouse();
}
