Last week I had the problem that Swagger wasn't working.
It just showed an HttpStatusCode 500 and in Visual Studio there wasn't any exception.
To identify the error I had to activate the 'DeveloperExceptionPage' in the Configure method.
void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
After this was activated, it showed me this nice error page with some great informations about the problem :)
In my case the error was simple to fix, just had two controller operations with same route and same HttpMethod.
Nov 18 2016, 02:40 PM