Agregamos el routing by default

startup.cs

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

            app.UseStaticFiles();     

            app.UseMvc(config=>{
                config.MapRoute("Default","/{controller}/{action}/{id?}", new{controller="Home", Action ="Index"});
            });        
        }