title: "This operation requires IIS integrated pipeline mode." debugging in VS2012
body: <p>Visual Studio 2013 created Web App using ASP.NET MVC, Owin, WebAPI.
  Everything runs fine in VS 2013. 
  However, when I debug in VS 2012 I get the error: "This operation requires IIS integrated pipeline mode."</p>
  
  <p>I don't know how I can change the IIS settings for the Dev instance.  Other similar solutions do not apply because of this.</p>
  
  <p><a href="https://stackoverflow.com/questions/22313167/this-operation-requires-iis-integrated-pipeline-mode">&quot;This operation requires IIS integrated pipeline mode.&quot;</a></p>
  
  <p>Stack Trace:</p>
  
  <pre><code>[PlatformNotSupportedException: This operation requires IIS integrated pipeline mode.]
  System.Web.HttpResponse.get_Headers() +9743542
  System.Web.HttpResponseWrapper.get_Headers() +9
  Microsoft.Owin.Host.SystemWeb.CallHeaders.AspNetResponseHeaders..ctor(HttpResponseBase response) +72
  Microsoft.Owin.Host.SystemWeb.OwinCallContext.CreateEnvironment() +434
  Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContext.GetInitialEnvironment(HttpApplication application) +303
  Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContext.PrepareInitialContext(HttpApplication application) +65
  Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContextStage.BeginEvent( Object sender, EventArgs e, AsyncCallback cb, Object extradata) +622
  System.Web.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +285
  System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean&amp; completedSynchronously) +155
  </code></pre>