Hello i'm having a deadlock problem with the following code. It happens when i call the function getMap(). But i can't reealy see what can cause this.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Drawing;
using System.Drawing.Imaging;
using System.Threading;

using AForge;
using AForge.Imaging;
using AForge.Imaging.Filters;
using AForge.Imaging.Textures;
using AForge.Math.Geometry;

namespace CDIO.Library
{
    public class Polygon
    {
        List<IntPoint> hull;
        public Polygon(List<IntPoint> hull)
        {
            this.hull = hull;
        }

        public bool inPoly(int x, int y)
        {
            int i, j = hull.Count - 1;
            bool oddNodes = false;

            for (i = 0; i < hull.Count; i++)
            {
                if (hull[i].Y < y && hull[j].Y >= y
                || hull[j].Y < y && hull[i].Y >= y)
                {
                    try
                    {
                        if (hull[i].X + (y - hull[i].X) / (hull[j].X - hull[i].X) * (hull[j].X - hull[i].X) < x)
                        {
                            oddNodes = !oddNodes;
                        }
                    }
                    catch (DivideByZeroException e)
                    {
                        if (0 < x)
                        {
                            oddNodes = !oddNodes;
                        }
                    }
                }
                j = i;
            }
            return oddNodes;
        }

        public Rectangle getRectangle()
        {
            int x = -1, y = -1, width = -1, height = -1;
            foreach (IntPoint item in hull)
            {
                if (item.X < x || x == -1)
                    x = item.X;
                if (item.Y < y || y == -1)
                    y = item.Y;


                if (item.X > width || width == -1)
                    width = item.X;
                if (item.Y > height || height == -1)
                    height = item.Y;


            }
            return new Rectangle(x, y, width-x, height-y);
        }

        public Point[] getMap()
        {
            List<Point> points = new List<Point>();
            lock (hull)
            {
                Rectangle rect = getRectangle();
                for (int x = rect.X; x <= rect.X + rect.Width; x++)
                {
                    for (int y = rect.Y; y <= rect.Y + rect.Height; y++)
                    {
                        if (inPoly(x, y))
                            points.Add(new Point(x, y));
                    }
                }
            }
            return points.ToArray();
        }

        public float calculateArea()
        {
            List<IntPoint> list = new List<IntPoint>();
            list.AddRange(hull);
            list.Add(hull[0]);

            float area = 0.0f;
            for (int i = 0; i < hull.Count; i++)
            {
                area += list[i].X * list[i + 1].Y - list[i].Y * list[i + 1].X;
            }
            area = area / 2;
            if (area < 0)
                area = area * -1;
            return area;
        }
    }
}