title: Uniq static database context with iis
body: <p>I develop a web application ASP.NET MVC with EF5. I use static database context. But it raise an datareader error. Because static variables shared in application pool. I did not know. How can i change this settings with IIS. I need a quick solution. If i don't use my application crash at another part. 
  Shortly i need uniqe db context with every request.</p>
  
  <pre><code>private static AppContext _db;
  public static AppContext Create()
  {
      //i need uniqe instance every request.
      return _db ?? (_db = new AppContext());
  }
  </code></pre>