public static bool IsNullOrEmpty(Rectangle2D rect)
{
if (rect == null)
{
return true;
}
if (rect._x.ValueCheck() && rect._y.ValueCheck() && rect._width.ValueCheck() && rect._height.ValueCheck())
{
return false;
}
if (rect._width < 0.0 || rect._height < 0.0)
{
return true;
}
return true;
}