title: How can I add option groups in ASP.NET drop down list?
body: <p>I have a requirement of grouping the drop down list options in ASP.NET drop down server control. Do you have any idea to how to approach the issue? I am new to ASP.NET.</p>
  
  <p><img src="https://i.stack.imgur.com/6Cb7f.gif" alt="My requirement."></p>