startup.cs

    public void Configure(IApplicationBuilder app, IHostingEnvironment env)
    {
      if (env.IsDevelopment())
      {
        app.UseDeveloperExceptionPage();
      }

      app.UseStaticFiles();

      app.UseAuthentication();

      app.UseMvc(cfg =>
      {
        cfg.MapRoute("Fallback", "{controller}/{action}/{id?}", new { controller = "Root", action = "Index" });
      });

      if (env.IsDevelopment())
      {
        using (var scope = app.ApplicationServices.CreateScope())
        {
          var seeder = scope.ServiceProvider.GetService<DutchSeeder>();
          seeder.SeedAsync().Wait();
        }
      }

    }