title: Disabled aspx button lose bootstrap class
body: <p>I have this textbox</p>
  
  <pre><code>&lt;asp:TextBox ID="tbid" runat="server" class="form-control"&gt;&lt;/asp:TextBox&gt;
  </code></pre>
  
  <p>form-control is a bootstrap class so the textbox gets the bootstrap look, if I disable the control from code using</p>
  
  <pre><code>tbid.Enabled = false;
  </code></pre>
  
  <p>the textbox loses the form-control class, after inspected the textbox I found out that it gets replaced by the aspNetDisabled class.</p>
  
  <p>how I can prevent the change of class I want to keep the disabled button with the bootstrap look even if it is disabled.</p>