Asp.Net WebApi2 Enable CORS not working with AspNet.WebApi.Cors 5.2.3

Question

I tried to follow the steps at http://enable-cors.org/server_aspnet.html to have my RESTful API (implemented with ASP.NET WebAPI2) work with cross origin requests (CORS Enab

Answer 1

After some modifications in my Web.config CORS suddenly stopped working in my Web API 2 project (at least for OPTIONS request during the preflight). It seems that you need to have the section mentioned below in your Web.config or otherwise the (global) EnableCorsAttribute will not work on OPTIONS requests. Note that this is the exact same section Visual Studio will add in a new Web API 2 project.