public void MoveY(int dy)
{
Points.ForEach(p => p.y += dy);
NoRotatePoints.ForEach(p => p.y += dy);
RotatePoint.Y += dy;
}
public void MoveX(int dx)
{
Points.ForEach(p => p.x += dx);
NoRotatePoints.ForEach(p => p.x += dx);
RotatePoint.X += dx;
}