Json.NET deserializing custom object returns null

Question

how do i fix??

 

GetSSASAcademyBookedCoursesModel _contacts = new GetSSASAcademyBookedCoursesModel();

                _contacts = JsonConvert.DeserializeObject<GetSSASAcademyBookedCoursesModel>(jsonresult.Data.ToString());
                recordsTotal = _contacts.totalRecords;