private void OnRenderUserChart(ZedGraph.Web.ZedGraphWeb z, System.Drawing.Graphics g, ZedGraph.MasterPane masterPane)
        {
            GraphPane graphPane = masterPane[0];

            graphPane.Title.Text       = Resource.MemberGraphTitle;
            graphPane.XAxis.Title.Text = Resource.MemberGraphXAxisLabel;
            graphPane.YAxis.Title.Text = Resource.MemberGraphYAxisLabel;

            PointPairList pointList = new PointPairList();

            using (IDataReader reader = SiteUser.GetUserCountByYearMonth(siteSettings.SiteId))
            {
                while (reader.Read())
                {
                    double x = new XDate(Convert.ToInt32(reader["Y"]), Convert.ToInt32(reader["M"]), 1);
                    double y = Convert.ToDouble(reader["Users"]);
                    pointList.Add(x, y);
                }
            }

            LineItem myCurve2 = graphPane.AddCurve(Resource.MemberGraphYAxisLabel, pointList, Color.Blue, SymbolType.Circle);

            // Fill the area under the curve with a white-red gradient at 45 degrees
            myCurve2.Line.Fill = new Fill(Color.White, Color.Green, 45F);
            // Make the symbols opaque by filling them with white
            myCurve2.Symbol.Fill = new Fill(Color.White);

            // Set the XAxis to date type
            graphPane.XAxis.Type      = AxisType.Date;
            graphPane.XAxis.CrossAuto = true;

            // Fill the axis background with a color gradient
            graphPane.Chart.Fill = new Fill(Color.White, Color.LightGoldenrodYellow, 45F);



            masterPane.AxisChange(g);
        }