title: HttpContext not available in Class Library
body: <p>I am working on a project where I have a C# class library which needs to use the <code>System.web.HttpContext</code>. I've done this before in another project without problem but now its not working. I'm not sure what I am missing they're both targeting .net 3.5 and I've added the reference <code>System.web</code> and added the directive <code>using System.web</code>. </p>
  
  <p>However, when I try and do <code>HttpContext</code> nothing is found. I've tried using the full path <code>System.web.HttpContext</code> but the only thing that comes up are 3 items related to ASP. </p>
  
  <p>Below are screenshots from the working project intellisense and the non-working intellisense</p>
  
  <p>Below is the working screenshot</p>
  
  <p><img src="https://i.stack.imgur.com/tGKi3.png" alt="working screenshot"></p>
  
  <p>and below is the non working screenshot</p>
  
  <p><img src="https://i.stack.imgur.com/jEz4A.png" alt="not working screenshot"></p>
  
  <p>Thanks for any help you can provide</p>