Idea how to solve one problem

[mitko29]

Well , what can I say sorry for misunderstanding

I already started writing the code , but I have one little glitch and I post it here if someone is able to help me.
So I am trying to sort with my custom function List<Point>:

  public class PointSort : IComparer
        {
            public enum Mode
            {
                sinus,
                cos
            }

            Mode currentMode = Mode.sinus;

            public PointSort(Mode mode)
            {
                currentMode = mode;
            }

        
            int IComparer.Compare(object a, object b)
            {
                Point one = (Point)a;
                Point two = (Point)b;
                if ((one.x - sx) / (Math.Sqrt(Math.Pow(one.x - sx, 2) + Math.Pow(one.y - sy, 2))) > (two.x - sx) / (Math.Sqrt(Math.Pow(two.x - sx, 2) + Math.Pow(two.y - sy, 2))))
                {
                    return 1;
                }
                else
                {
                    return 0;
                }

            }
        }

and then I just use this in order to sort:

 Array.Sort(masiv, new PointSort(PointSort.Mode.sinus));

and the error is:

Where masiv is List<Point> and here my struct for Point:

 public struct Point
        {
            public int x, y;

            public Point(int p1, int p2)
            {
                x = p1;
                y = p2;
            }
        }