OpenTK.Graphics.Rectangle.Intersect C# (CSharp) Method

        public static Rectangle Intersect(Rectangle a, Rectangle b)
        {
            // MS.NET returns a non-empty rectangle if the two rectangles
            // touch each other
            if (!a.IntersectsWithInclusive(b))
                return Empty;
            return Rectangle.FromLTRB(
                Math.Max(a.Left, b.Left),
                Math.Max(a.Top, b.Top),
                Math.Min(a.Right, b.Right),
                Math.Min(a.Bottom, b.Bottom));
        }