Not supported by Swagger 2.0: Multiple operations with path

Question

I have integrated swagger in WebApi 2 application. It works fine when application has single controller. When I added second controller in the application. I got following

Answer 1

An answer I haven't seen: I bungled up usings.

My controller has some MVC items (List items) and thus has a link:

using System.Web.Http;
using System.Web.Mvc;

Because of this, somehow, it got registered twice (I assume). Problem was fixed by using the full qualification for RoutePrefix/Route/HttpGet and others.

namespace MyNameSpace
{
    [System.Web.Http.RoutePrefix("api/Reports")]
    public class ReportsController
    {
        {...constructor...}

        [System.Web.Http.Route("Scans")]
        [System.Web.Http.HttpGet,ResponseType(typeof(List))]
        public ascyn Task GetScans() {...}