Startup.cs

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.FileProviders;
using System.IO;

namespace EJ2CoreSampleBrowser
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddMvc()
                .AddJsonOptions(x =>
                {
                    x.JsonSerializerOptions.PropertyNamingPolicy = null;
                });

            services.AddDirectoryBrowser();
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
                //app.UseBrowserLink();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
            }

            app.UseStaticFiles(); // For the wwwroot folder

            app.UseStaticFiles(new StaticFileOptions
            {
                ServeUnknownFileTypes = true,
                DefaultContentType = "plain/text",
                FileProvider = new PhysicalFileProvider(
                    Path.Combine(Directory.GetCurrentDirectory(), "Controllers")),
                RequestPath = "/Controllers"
            });

            app.UseStaticFiles(new StaticFileOptions
            {
                ServeUnknownFileTypes = true,
                DefaultContentType = "plain/text",
                FileProvider = new PhysicalFileProvider(
                    Path.Combine(Directory.GetCurrentDirectory(), "Views")),
                RequestPath = "/Views"
            });

            app.UseRouting();

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllerRoute(
                    name: "default",
                    pattern: "{controller}/{action}/{id?}",
                    defaults: new { controller = "Home", action = "Index" });
            });
        }
    }
}