//Add LinkButton
      lnbSowHide = new LinkButton();

      lnbSowHide.ID = "lnbShowHide";
      lnbSowHide.Click += new System.EventHandler(this.Button_Click);
      Controls.Add(lnbSowHide);

    private void Button_Click(object sender, System.EventArgs e)
    {
      ShowSection = !ShowSection;
    }

    protected override void Render(HtmlTextWriter output)
    {

      // Add WebControl Formatting
      AddAttributesToRender(output);

      // Open table
      output.AddAttribute(HtmlTextWriterAttribute.Border, "0");
      output.AddAttribute(HtmlTextWriterAttribute.Cellspacing, "1");
      output.AddAttribute(HtmlTextWriterAttribute.Cellpadding, "1");
      if (ShowSection)
      {
       // output.AddAttribute(HtmlTextWriterAttribute.Style, "height:25px");
      }


      output.RenderBeginTag( HtmlTextWriterTag.Table);

      // Create first row
      output.RenderBeginTag( HtmlTextWriterTag.Tr);
      output.AddAttribute(HtmlTextWriterAttribute.Height, "25");
      output.AddAttribute(HtmlTextWriterAttribute.Bgcolor, "LightSteelBlue");
      output.RenderBeginTag( HtmlTextWriterTag.Td);
      lnbSowHide.RenderControl(output);
      output.RenderEndTag();
      output.RenderEndTag();

      // Create second row
      if (ShowSection)
      {
        output.RenderBeginTag( HtmlTextWriterTag.Tr);
        output.RenderBeginTag( HtmlTextWriterTag.Td);
        for (int i =  0 ; i <= Controls.Count - 1 ; i++)
        {
          if (!(Controls[i].ID == lnbSowHide.ID))
            Controls[i].RenderControl(output);
        }
        output.RenderEndTag();
        output.RenderEndTag();
      }
      // Close table
      output.RenderEndTag();
    }

    private void Button1_Click(object sender, System.EventArgs e)
    {
      ShowHidePanel1.ShowSection = true;
    }

    private void Button2_Click(object sender, System.EventArgs e)
    {
      ShowHidePanel1.ShowSection = false;
    }

    private void Button3_Click(object sender, System.EventArgs e)
    {
      ShowHidePanel1.ShowSection = !ShowHidePanel1.ShowSection;
    }

    public bool ShowSection
    {
      get
      {
        if (ViewState["showsection"] == null) 
          return true;
        else
          return (string)this.ViewState["showsection"] == "True";
      }

      set
      {
        this.ViewState["showsection"] = value.ToString();
      }