Получение файла с данными по URL

string json = @"{
  'Name': 'Bad Boys',
  'ReleaseDate': '1995-4-7T00:00:00',
  'Genres': [
    'Action',
    'Comedy'
  ]
}";
 
Movie m = JsonConvert.DeserializeObject<Movie>(json);

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.StaticFiles;
using Microsoft.Extensions.DependencyInjection;
 
namespace ConsoleApp875
{
    class Program
    {
        static void Main(string[] args)
        {
            new WebHostBuilder()
                .UseKestrel()
                .UseUrls("http://*:5000")
                 .ConfigureServices((hostContext, services) => services.AddMvc())
                 .Configure(app => { app.UseMvcWithDefaultRoute(); })
                .Build()
                .Run();
        }
    }
 
    [Route("api/[controller]")]
    public class MyClass : Controller
    {
        [HttpGet]
        public IActionResult Get()
        {
            new FileExtensionContentTypeProvider().TryGetContentType("test.json", out string contentType);
            Response.Headers["Content-Disposition"] = "attachment; filename=\"test.json\"";
            return new FileStreamResult(System.IO.File.OpenRead(@"C:\test.json"), contentType);
        }
    }
}