I have been doing most of my ASP.Net MVC RESTful web service development on IIS6 or IIS7. Recently however, I tried it on Windows 7 RTM using IIS7.5. Using the “Classic .Net AppPool” everything worked great. Then I tried the “DefaultAppPool” (i.e. using Integrated Mode). Everything seemed fine… until I wanted to PUT a new resource and DELETE a resource.

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