c# - ASP.NET Core - The name 'JsonRequestBehavior' does not exist in the current context

Question

In my ASP.NET Core (.NET Framework) project, I'm getting above error on my following Controller Action method. What I may be missing? Or, are there any work arounds?:

public class ClientController : Controller
{
    public ActionResult CountryLookup()
    {
        var countries = new List<SearchTypeAheadEntity>
        {
            new SearchTypeAheadEntity {ShortCode = "US", Name = "United States"},
            new SearchTypeAheadEntity {ShortCode = "CA", Name = "Canada"}
        };
        
        return Json(countries, JsonRequestBehavior.AllowGet);
    }
}

UPDATE:

Please note folowing comments from @NateBarbettini below:

1. JsonRequestBehavior has been deprecated in ASP.NET Core 1.0.
2. In accepted response from @Miguel below, the return type of action method does not specifically need to be of type JsonResult. ActionResult or IActionResult works too.

Answer 1

Returning Json-formatted data:

public class ClientController : Controller
{
    public JsonResult CountryLookup()
    {
         var countries = new List<SearchTypeAheadEntity>
         {
             new SearchTypeAheadEntity {ShortCode = "US", Name = "United States"},
             new SearchTypeAheadEntity {ShortCode = "CA", Name = "Canada"}
         };

         return Json(countries);
    }
}