Insert blank value in a serie in a chart Line using ASP.NET Chart Control

I have the following code:
protected void Page_Load(object sender, EventArgs e)
            Chart2.Width = 412;
            Chart2.Height = 296;
            Chart2.RenderType = RenderType.ImageTag;

            Chart2.Palette = ChartColorPalette.BrightPastel;
            var t = new Title("No Code Behind Page", Docking.Top, new System.Drawing.Font("Trebuchet MS", 14, System.Drawing.FontStyle.Bold), System.Drawing.Color.FromArgb(26, 59, 105));
            Chart2.ChartAreas.Add("Series 1");

            Chart2.Series.Add("Series 1");
            // add points to series 1
            for (int value = 0; value < 12; value++)
                if (value == 4)
                      Chart2.Series["Series 1"].Points.AddY(null);
                    Chart2.Series["Series 1"].Points.AddY(value);

            var ser = Chart2.Series[0];
            ser.ChartType = SeriesChartType.Line;
            ser.MarkerStyle = MarkerStyle.Circle;
            Chart2.BorderSkin.SkinStyle = BorderSkinStyle.Emboss;
            Chart2.BorderColor = System.Drawing.Color.FromArgb(26, 59, 105);
            Chart2.BorderlineDashStyle = ChartDashStyle.Solid;
            Chart2.BorderWidth = 2;
            Chart2.Legends[0].Alignment = System.Drawing.StringAlignment.Center;
            Chart2.Legends[0].LegendStyle = LegendStyle.Table;
            Chart2.Legends[0].TableStyle = LegendTableStyle.Auto;
            Chart2.Legends[0].Docking = Docking.Bottom;
            // Render chart control
            Chart2.Page = this;

Basically what I want to do is insert a null value when the X axis = 4.
Thank you for your help.
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GaspTeamAuthor Commented:
Ok sorry, I found my answer instead of
Chart2.Series["Series 1"].Points.AddY(null);
it sould be
Chart2.Series["Series 1"].Points.AddY(DBNull.Value);

Thanks anyway.

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GaspTeamAuthor Commented:
I found it myself and it fixed my problem. but i still want to share it with others.
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