title: String and Variable concatenation in Label Tag
body: <p>I know; this question has been asked several times already, but after looking through many questions I still can't get it to work. I have a <code>modalPopupextender</code> which opens up a <code>Panel</code> as seen in code below:</p>
  
  <pre><code>&lt;asp:Panel ID="pnlRename" Style="display: none;" runat="server"&gt;
      &lt;div class="Popup radius" style="width: 400px;"&gt;
        &lt;div class="PopupHead PageEntry radiusTop"&gt;
           &lt;asp:Label ID="lblRename" runat="server" 
               Text='&lt;%= "Rename " + TreeView1.SelectedNode.Text %&gt;'&gt;&lt;/asp:Label&gt;
        &lt;/div&gt;
      &lt;/div&gt;
  &lt;/asp:Panel&gt;
  </code></pre>
  
  <p>I want <code>"Rename " + TreeView1.SelectedNode.Text</code>'s value to show up in the <code>Text</code> of <code>lblRename</code> but I am getting exactly what I typed:
   i.e. <code>"Rename " + TreeView1.SelectedNode.Text</code> and not its <code>value</code>. </p>