How to dynamically apply updatepanel to a cell in asp.net c# code

<table>
<tr>
                            <td class="R_Header_Max_2" align="right" id="Cell_Accounts_Total" runat="server">
                                0</td>
<class="Table_Main_Row_Width">
                        </td>
</tr>
</table>

protected void Page_Load(object sender, EventArgs e)
   {
       UpdatePanel.ContentTemplateContainer.Controls.Add(new LiteralControl("<span>From:&nbsp;</span>"));
       UpdatePanel.ContentTemplateContainer.Controls.Add(Cell_Accounts_Total);

   }