title: How to add text in the center of the polygon in Gmap.net
body: <p>I want to add a text in the center position of the already zone polygon. I am able to show the polygon and also able to get the center position of the Polygon but I am not able to add the name of the polygon.</p>
  
  <p>I have done following so far :</p>
  
  <pre><code>        List&lt;PointLatLng&gt; listVertexPoints = Get_VertexPointsFromString(zoneVertex);
          foreach (PointLatLng vertex in listVertexPoints)
          {
              GMapMarkerCircle circleVertex = new GMapMarkerCircle(vertex, 1);
              circleVertex.Radius = 1;
              circleVertex.IsVisible = false;
              overlay.Markers.Add(circleVertex);
          }
  
          GMapPolygon zonePolygon;
          zonePolygon = new GMapPolygon(listVertexPoints, zoneName);
          zonePolygon.Fill = new SolidBrush(Color.FromArgb(50, Color.Red));
          zonePolygon.Stroke = new Pen(zoneBoundaryColor, 1);
          zonePolygon.IsFilled = true;
          zonePolygon.IsHitTestVisible = true;
          overlay.Polygons.Add(zonePolygon);
  
          PointLatLng centerPoint = GetZoneCenter(listVertexPoints);
  
          private PointLatLng GetZoneCenter(List&lt;PointLatLng&gt; vertexes)
          {
            PointLatLng centerPoint = new PointLatLng();
            int sum = 0;
            double lat = 0;
            double lng = 0;
            foreach (var point in vertexes)
            {
                sum += 1;
                lat += point.Lat;
                lng += point.Lng;
            }
            lat = lat / sum;
            lng = lng / sum;
            centerPoint.Lat = lat;
            centerPoint.Lng = lng;
            return centerPoint;
        }
          var labelMarker = new GmapMarkerWithLabel(centerPoint, zoneName, GMarkerGoogleType.blue);
          markerOverlay.Markers.Add(labelMarker);
          this.MainMap.Overlays.Add(overlay);
  </code></pre>
  
  <p>The above code showed a label marker but it does not appear in the correct place. Also, if you have any other way to show text within Polygon then you are most welcome.</p>
  
  <p>Thank you!</p>