There is no ConfigureServices because it's it's a simplest project type. But I tried to add services.AddHangfire(...) and result is same - compile error.
Here is project.json.
There are three possibility to create web application:
1. ASP.NET Web Application (.Net Framework):
UseHangfireServer is an extension to IAppBuilder, No problem to configure Hangfire
2. ASP.NET Core Web Application (.Net Core):
UseHangfireServer is an extension to IApplicationBuilder, No problem to configure Hangfire
3. ASP.NET Core Web Application (.Net Framework):
UseHangfireServer is an extension to IAppBuilder, but there is IApplicationBuilder only and it is not in the same assembly as in p.2
In this case the project doesn't compile