private static int NumPointLePlusHaut(Point[] points)
        {
            int numPoint = 0;
            for (int i = 0; i < 4; i++)
			{
			     if (points[i].Y < points[numPoint].Y)
                 {
                     numPoint = i;
                 }
			}
            return numPoint;
        }


Je connaissais pas ^^