Identify which link is clicked

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C#

MVC

I have an
<a id="y1">1 </a> <a id="y2">2</a>
in a page.I need to access it in the controller page. How can I do it?

I tried like this:

[HttpPost]
public ActionResult Event(FormCollection form)
{           
  form.GetValue("y1");          
  return View();       
}

But I am getting null value.