Resolving "this operation requires IIS integration pipeline mode" in ASP.net MVC2

Question

I'm developing an ASP.net MVC2 application, and implement an export to .csv controller action, but when I add the headers to force the download, The following appears in the debugger:

"this operation requires IIS integration pipeline mode"

I have searched on numerouse sites with Google, but have yet to resolve this. I am using:

• IIS 7.5
• Windows 7 Ultimate and
• .Net Framework 4.0,

The application pools for ASP.net are configured in integrated pipeline mode, as I don't understand the problem.

Can the community assist me solving this and explaining the error to me?

Answer 1

http://devproj20.blogspot.com/2008/02/this-operation-requires-iis-integrated.html

"You can work around this problem by adding your header this way instead:"

Response.AddHeader("myHeader", "someValue");

Answer 2

Go to Project Project properties (right click on project) and go to web tab on left side and check the property use Local IIS Web Server. enter image description here