title: string extension method for Session["key"]
body: <p>At times when we access <code>Session["key"].ToString()</code> it gives exception when session is expired &amp; in coding we try to access session variable. So I'm trying to create extension method on <code>object</code> class so that I could write it as <code>Session["key"].getString()</code> in coding so that every time I don't have to do <code>Convert.ToString(session["key"])</code></p>
  
  <p>Any other solutions are also appreciable.</p>