public ImageViewPort()
{
_viewPortInstance = this;
_currentPrimitive = new SelectionTool();
DoubleBuffered = true;
_shapeControl = new ShapeBoxControl(null);
_navigationControl = new NavigationControl();
SetStyle(
ControlStyles.AllPaintingInWmPaint | ControlStyles.UserPaint | ControlStyles.ResizeRedraw | ControlStyles.UserPaint |
ControlStyles.DoubleBuffer, true);
}