public bool intersect (Rectangle src2, out Rectangle dest)
Calculates the intersection of two rectangles. It is allowed for dest to be the same as
either src1 or src2. If the rectangles do not intersect, dest's width and height is set to 0
and its x and y values are undefined. If you are only interested in whether the rectangles intersect, but not in the intersecting area
itself, pass null for dest.
