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

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);    }}

In Code it's replace To JsonRequestBehavior.AllowGet with new Newtonsoft.Json.JsonSerializerSettings()

It's Work same as JsonRequestBehavior.AllowGet

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, new Newtonsoft.Json.JsonSerializerSettings());  }}

Some times you need to return a message back in JSON, simply use the JSON result as below, no need for jsonrequestbehavior any more, below simple code to use:

public ActionResult DeleteSelected([FromBody]List<string> ids){    try    {        if (ids != null && ids.Count > 0)        {            foreach (var id in ids)            {                bool done = new tblCodesVM().Delete(Convert.ToInt32(id));                            }            return Json(new { success = true, responseText = "Deleted Scussefully" });        }        return Json(new { success = false, responseText = "Nothing Selected" });    }    catch (Exception dex)    {                return Json(new { success = false, responseText = dex.Message });    }}