title: "Could not get any response" in Postman
body: <p>I am learning ASP.NET Core. The server I am using for this purpose is Postman, which I import a JSON file to from disc. The code for the API is written in Visual Studio and is compiled error-free.
  When I send a GET request in Postman, I get this error: "Could not get any response". 
  To solve this I made changes in the setting (see the attached images), but it was not the solution. Could you please me with this?
  <a href="https://i.stack.imgur.com/lXDEb.png" rel="noreferrer"><img src="https://i.stack.imgur.com/lXDEb.png" alt="enter image description here"></a> <a href="https://i.stack.imgur.com/0Bojv.png" rel="noreferrer"><img src="https://i.stack.imgur.com/0Bojv.png" alt="enter image description here"></a></p>
  
  <p>This is an screenshot showing the GET request and the error I get:<a href="https://i.stack.imgur.com/kPp6K.png" rel="noreferrer"><img src="https://i.stack.imgur.com/kPp6K.png" alt="enter image description here"></a></p>
  
  <p>The code for the Controller:</p>
  
  <pre><code>using Microsoft.AspNetCore.Mvc;
  using System;
  using System.Collections.Generic;
  using System.Linq;
  using System.Threading.Tasks;
  
  namespace CityInfo.API.Controllers
  {
      [Route("api/cities")]
      public class CitiesController : Controller
      {
          [HttpGet()]
          public IActionResult GetCities()
          {
              return Ok(CitiesDataStore.Current.Cities);
          }
  
          [HttpGet("{id}")]
          public IActionResult GetCity(int id)
          {
              var cityToReturn = CitiesDataStore.Current.Cities.FirstOrDefault(c =&gt; c.Id == id);
              //);
              if (cityToReturn == null)
                  return NotFound();
              else
                  return Ok(cityToReturn);
          }
      }
  }
  </code></pre>