title: How to retrieve HTML5 data-* Attributes using C#
body: <p>I have a asp checkbox in my form:                                           </p>
  
  <pre><code>&lt;asp:CheckBox id="option" runat="server" OnCheckedChanged="checkChange" data-attributeA="somevalue1" data-attributeB="somevalue2" AutoPostBack="true" /&gt;`
  </code></pre>
  
  <p>In my <code>OnCheckedChanged</code> event I want to retrieve these two data-attributes.</p>
  
  <pre><code>protected void checkChange(object sender, EventArgs e) {}
  </code></pre>
  
  <p>How do I do that?</p>