Razor File compilation-corespider

Startup.cs

public IWebHostEnvironment WebHostEnvironment { get; }
        public Startup(IWebHostEnvironment webHostEnvironment)
        {
            WebHostEnvironment = webHostEnvironment;
        }
       public void ConfigureServices(IServiceCollection services)
        {
            services.AddControllersWithViews();
#if DEBUG 
            if (WebHostEnvironment.IsDevelopment())
            {
                services.AddRazorPages().AddRazorRuntimeCompilation();
            }
#endif
        }