“This operation requires IIS integrated pipeline mode.”

Question

I have a web application being developed on Windows 8.1, .NET 4.5.1, IIS 8.5 (under Integrated AppPool), Visual Studio 2013 over the default template that includes ASP.NET I

Answer 1

This was a strange problem since my hosts IIS shouldn't complain that it requires integrated pipeline mode when it already is in that mode as I stated in my question as:

I have searched a lot and unable to find anything except for directing the reader to change the pipeline from classic mode to integrated mode that which I already did with no luck..

Using Levi's directions, I put <%: System.Web.Hosting.HttpRuntime.UsingIntegratedPipeline %> and <%: System.Web.Hosting.HttpRuntime.IISVersion %>* on an empty aspx page and told my host what going on and asked them to fix the problem and confirm the problem using the page I uploaded... I checked very often if something has changed at the state of the page and I can see that they struggled 3-4 hours to solve it...

When I asked what they have done to solve the problem, their answer was kind of 'classified', since they said:

Our team made the required changes on the server

The problem was all with my host.

* Update: As Ben stated in the comments

1. <%: System.Web.Hosting.HttpRuntime.UsingIntegratedPipeline %> and
2. <%: System.Web.Hosting.HttpRuntime.IISVersion %>

are no longer valid and they are now:

1. <%: System.Web.HttpRuntime.UsingIntegratedPipeline %> and
2. <%: System.Web.HttpRuntime.IISVersion %>