test.cs

private static void StartWebServer()
{
    var assembly = Assembly.Load("TXTextControl.Web.MVC.DocumentViewer");

    var builder = WebHost.CreateDefaultBuilder();
    var app = builder
      .UseKestrel(options => options.Listen(IPAddress.Parse("127.0.0.1"), 8888))
      .UseContentRoot(Directory.GetCurrentDirectory())
      .UseWebRoot(Path.Combine(Directory.GetCurrentDirectory(), "wwwroot"))
      .ConfigureServices((services) =>
      {
          services.AddCors();
          services.AddMvc().AddMvcOptions(options =>
          {
              options.EnableEndpointRouting = false;
          }).AddApplicationPart(assembly);
      })
      .Configure(app =>
      {
          app.UseHttpsRedirection();

          app.UseRouting();
          
          app.UseCors(builder =>
          {
              builder.AllowAnyOrigin()
               .AllowAnyMethod()
               .AllowAnyHeader();
          });

          app.UseAuthorization();

          app.UseStaticFiles(new StaticFileOptions()
          {
              FileProvider = new PhysicalFileProvider(Path.Combine(Directory.GetCurrentDirectory(), "wwwroot")),
              RequestPath = ""
          });

          app.UseMvcWithDefaultRoute();

      }).Build();

    app.Run();
}