internal bool Settopleft(Point ptl) { if (_topleft.Getx() < this._bottomright.Getx() && _topleft.Gety() > this._bottomright.Gety()) { this._height = _topleft.Gety() - _bottomright.Gety(); this._width = _bottomright.Getx() - _topleft.Getx(); return(true); } return(false); }