Asp.net Core service to read Rendered Razor View as string

ControllerExample.cs

public class DocumentsController
{
    private readonly IViewRenderService _viewRenderService;
    
    // Dependency Injection is happening here
    public DocumentsController(IViewRenderService viewRenderService)
    {
        _viewRenderService = viewRenderService;
    }
    
    // .... Methods and more Methods
    
    [HttpGet("generate")]
    [AllowAnonymous]
    public async Task<IActionResult> Generate()
    {
      try
      {
          // ...
          string result = await _viewRenderService.RenderToStringAsync("SignatureEvents", usersModel);
          // ... Results
      }
      catch (Exception e)
      {
          throw e;
      }
    }
}

Startup.cs

public void ConfigureServices(IServiceCollection services)
        {
            // ...
            // Adding the service in startup.cs, we add the capability to add this class as Dependency Injection
            services.AddScoped<IViewRenderService, ViewRenderService>();
            // ...
        }

ViewRenderService.cs

public interface IViewRenderService
    {
        Task<string> RenderToStringAsync(string viewName, object model);
    }

    public class ViewRenderService : IViewRenderService
    {
        private readonly IRazorViewEngine _razorViewEngine;
        private readonly ITempDataProvider _tempDataProvider;
        private readonly IServiceProvider _serviceProvider;

        public ViewRenderService(IRazorViewEngine razorViewEngine,
            ITempDataProvider tempDataProvider,
            IServiceProvider serviceProvider)
        {
            _razorViewEngine = razorViewEngine;
            _tempDataProvider = tempDataProvider;
            _serviceProvider = serviceProvider;
        }

        public async Task<string> RenderToStringAsync(string viewName, object model)
        {
            var httpContext = new DefaultHttpContext { RequestServices = _serviceProvider };
            var actionContext = new ActionContext(httpContext, new RouteData(), new ActionDescriptor());

            using (var sw = new StringWriter())
            {
                var viewResult = _razorViewEngine.FindView(actionContext, viewName, false);

                if (viewResult.View == null)
                {
                    throw new ArgumentNullException($"{viewName} does not match any available view");
                }

                var viewDictionary = new ViewDataDictionary(new EmptyModelMetadataProvider(), new ModelStateDictionary())
                {
                    Model = model
                };

                var viewContext = new ViewContext(
                    actionContext,
                    viewResult.View,
                    viewDictionary,
                    new TempDataDictionary(actionContext.HttpContext, _tempDataProvider),
                    sw,
                    new HtmlHelperOptions()
                );

                await viewResult.View.RenderAsync(viewContext);
                return sw.ToString();
            }
        }
    }