测试GeoPoint是否在多边形内

Question

我在mapControl中绘制了一个多边形，并且我有另一个地点（47.0025462722356,28.7778985977174），这是这个多边形。如果GeoPoint是否为多边形，如何创建一个返回的函数？非常感谢你

        private void DrawPolygon()
        {
            VectorItemsLayer layer = VectorItemsLayer)this.mapControl.Layers[1];
            MapItemStorage ItemStorage = (MapItemStorage)layer.Data;
            var path = new MapPath();
            var segment = new MapPathSegment();
            segment.Points.AddRange(new GeoPoint[]
            {
                new GeoPoint(47.000751662342765, 28.782015716126669),
                new GeoPoint(47.003499105949331, 28.779784489235578),
                new GeoPoint(47.005060446204077, 28.776670571833844),
                new GeoPoint(47.002626050570065, 28.774355254904908),
                new GeoPoint(47.000264065129222, 28.779487220183803),
                new GeoPoint(47.000751662342765, 28.782015716126669)
            });
            path.Segments.Add(segment);
            ItemStorage.Items.Add(path);
        }