title: UpdatePanel does not have a public property named 'TextBox'.
body: <p>I'm looking to update the contents of a panel using an asp:updatepanel.
  I get an error on the page saying: DotNetNuke.Services.Exceptions.ModuleLoadException: Type 'System.Web.UI.UpdatePanel' does not have a public property named 'TextBox'.</p>
  
  <p>See code below:</p>
  
  <pre><code>    &lt;asp:ScriptManager runat="server" ID="ScriptManager" /&gt;
      &lt;asp:UpdatePanel runat="server" ID="brandAddingContainer" Visible="false"&gt;
          &lt;ContentTemplate&gt;
              &lt;asp:LinkButton runat="server" ID="brandAddingPrompt"&gt;
                  &lt;img src="/images/add.gif" alt="Add New Brand" onclick="addNewBrand_clicked"/&gt; Add New Brand
              &lt;/asp:LinkButton&gt;
  
              &lt;asp:Panel ID="sendNewBrand" runat="server"&gt;
                  &lt;asp:TextBox runat="server" ID="newBrandName"&gt;&lt;/asp:TextBox&gt;
                  &lt;asp:Button runat="server" ID="sendBrandName" Text="Add Brand" OnClick="sendNewBrand_clicked" /&gt;
                  &lt;asp:Label runat="server" ID="insertionFeedback" Visible="false" /&gt;
              &lt;/asp:Panel&gt;
          &lt;/ContentTemplate&gt;
  
          &lt;Triggers&gt;
              &lt;asp:AsyncPostBackTrigger ControlID="brandAddingPrompt" EventName="Click" /&gt;
          &lt;/Triggers&gt;
      &lt;/asp:UpdatePanel&gt;
  </code></pre>