title: System.Web.Helpers does not exist in namespace: WebImage
body: <p>While I know this has been "answered" about 50 million times,  I haven't found an answer that fixes the issue for me, so I feel like I have no choice but to ask again.</p>
  
  <p>Previous suggestions:
  <a href="https://stackoverflow.com/questions/4169618/razor-pages-in-mvc-are-giving-a-compile-error-with-system-web-helpers-not-being">Razor pages in MVC are giving a compile error with System.Web.Helpers not being found</a></p>
  
  <pre><code>&lt;add assembly="System.Web.Helpers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /&gt;
  </code></pre>
  
  <p>I have added this to my web.config, but the issue remains.</p>
  
  <p><a href="https://stackoverflow.com/questions/5567945/type-or-namespace-name-does-not-exist">Type or namespace name does not exist</a></p>
  
  <p>I only have one project, and the targetFramework is 4.0.</p>
  
  <p>I installed Microsoft.Web.Helpers 1.15 (2.0 is incompatible with MVC3.) The Microsoft.Web.Helpers.dll is in my bin folder.</p>
  
  <p>The odd thing is that there's Microsoft.Web.Helpers and System.Web.Helpers. I need System.Web.Helpers in this case, because I'm using WebImage in my code.</p>