private void DrawAndLabelANiceLookingRoad_Load(object sender, EventArgs e)
        {
            winformsMap1.MapUnit = GeographyUnit.DecimalDegree;
            winformsMap1.BackgroundOverlay.BackgroundBrush = new GeoSolidBrush(GeoColor.FromArgb(255, 233, 232, 214));

            inmlayer = new InMemoryFeatureLayer();
            inmlayer.InternalFeatures.Add(new Feature("LINESTRING(0 0,10 10)"));
            inmlayer.InternalFeatures.Add(new Feature(-20, -20));
            inmlayer.InternalFeatures.Add(new Feature("POLYGON ((30 10, 10 20, 20 40, 40 40, 30 10))"));

            inmlayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
            inmlayer.ZoomLevelSet.ZoomLevel01.CustomStyles.Add(LineStyles.Canal1);
            inmlayer.ZoomLevelSet.ZoomLevel01.CustomStyles.Add(PointStyles.Capital1);
            inmlayer.ZoomLevelSet.ZoomLevel01.CustomStyles.Add(AreaStyles.Country1);


            LayerOverlay staticOverlay = new LayerOverlay();
            staticOverlay.Layers.Add("AustinStreetsShapeLayer", inmlayer);
            winformsMap1.Overlays.Add(staticOverlay);


            inmlayer.Open();
            winformsMap1.CurrentExtent = inmlayer.GetBoundingBox();
            inmlayer.Close();

            Timer timer = new Timer();
            timer.Interval = 1000;
            timer.Tick += new EventHandler(timer_Tick);
            timer.Start();
        }
        InMemoryFeatureLayer inmlayer;
        bool flag;

        void timer_Tick(object sender, EventArgs e)
        {
            inmlayer.InternalFeatures.Clear();

            if (flag)
            {
                inmlayer.InternalFeatures.Add(new Feature("LINESTRING(0 0,10 10)"));
                inmlayer.InternalFeatures.Add(new Feature(-20, -20));
                inmlayer.InternalFeatures.Add(new Feature("POLYGON ((30 10, 10 20, 20 40, 40 40, 30 10))"));
                flag = false;
            }
            else {

                inmlayer.InternalFeatures.Add(new Feature("LINESTRING(18 64,74 22)"));
                inmlayer.InternalFeatures.Add(new Feature(-40, -20));
                inmlayer.InternalFeatures.Add(new Feature("POLYGON ((10 10, 10 20, 20 40, 40 40, 10 10))"));
                flag = true;
            }
            winformsMap1.Refresh();
        }