EnableSwagger.cs

        private static void ConfigureSwagger(HttpConfiguration config)
        {
            config.EnableSwagger(
                c => {
                    c.SingleApiVersion("all", "Some API");
                    c.IncludeXmlComments(string.Format(@"{0}\bin\Your.Assembly.XmlComments.xml",
                        AppDomain.CurrentDomain.BaseDirectory));
                    c.RootUrl(req =>
                        req.RequestUri.GetLeftPart(UriPartial.Authority) +
                        req.GetRequestContext().VirtualPathRoot.TrimEnd('/'));
                })
                   .EnableSwaggerUi(c => {
                       c.DisableValidator();                       
                   });
        }