This is something I did not manage to find from the internet.
We have a web application that uses SignalR that requires Owin that needs IIS Integrated Pipeline mode. When I am running our web application on Cassini Dev Server I get following error:
[PlatformNotSupportedException: This operation requires IIS integrated pipeline mode.]
System.Web.HttpResponse.get_Headers() +214
Microsoft.Owin.Host.SystemWeb.CallHeaders.AspNetResponseHeaders..ctor(HttpResponseBase response) +37
Microsoft.Owin.Host.SystemWeb.OwinCallContext.CreateEnvironment() +492
Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContext.GetInitialEnvironment(HttpApplication application) +263
Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContext.PrepareInitialContext(HttpApplication application) +19
Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContextStage.BeginEvent(Object sender, EventArgs e, AsyncCallback cb, Object extradata) +462
System.Web.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +556
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +288
Running IIS Express and other alternatives in automatic tests is PITA.