public Point[] GenerateDiagonalLine(Point dest)
        {
            if (dest.X == Location.X || dest.Y == Location.Y)
            {
                return null;
            }
            var rise = Location.Y - dest.Y;
            var run = Location.X - dest.X;
            if (rise / run != 1 && run / rise != -1)
            {
                return null;
            }
            var lower = Location.Y < dest.Y ? Location.Y : dest.Y;
            var upper = Location.Y < dest.Y ? dest.Y : Location.Y;
            var dx = Location.X < dest.X ? 1 : -1;
            var dy = Location.Y < dest.Y ? 1 : -1;
            var pl = new List<Point>();
            var cx = dest.X - Location.X;// Location.X < dest.X ? dest.X - Location.X : Location.X - dest.X;
            var cy = Location.Y < dest.Y ? dest.Y - Location.Y : Location.Y - dest.Y;
            System.Diagnostics.Debug.Print("Location " + Location + " " + dest);
            for (var i = lower + 1; i < upper; i++)
            {
                pl.Add(new Point(cx, i - 1));
                cx += dx;
                //cy += dy;
            }
            return pl.ToArray();
        }