Json Data in response is coming Null

Hi, Am fairly new to Restsharp. Currently using RestSharp in my MVC 5 project and doing the below and even though I have data, am seeing null in response.Data. Can you please let me know if am doing anything wrong?

 private RestClient client;
        private string url = "http://localhost:58482/api/tblObjectPermission/GetAlltblObjectPermission"; 
        public TblObjectPermissionClient()
        {
            client = new RestClient(url);
        }
        public IEnumerable<tblObjectPermission> GetAlltblObjectPermission()
        {
            var request = new RestRequest("api/serverdata", Method.GET);
            request.RequestFormat = DataFormat.Json;

        var response = client.Execute<List<tblObjectPermission>>(request);

        if (response.Data == null)
            throw new Exception(response.ErrorMessage);
        return response.Data;
    }

Model class is

 public partial class tblObjectPermission
    {
        public int ObjectPermissionID { get; set; }
        public bool DeleteYN { get; set; }
        public Nullable<int> ObjectID { get; set; }
        public Nullable<int> SubscriberID { get; set; }
        public Nullable<int> UserID { get; set; }
        public Nullable<int> ObjectAccessID { get; set; }
        public Nullable<System.DateTime> ChangeDate { get; set; }
        public Nullable<int> ChangeUser { get; set; }
        public byte[] RowVersion { get; set; }
        public virtual tblObject tblObject { get; set; }
        public virtual tsysObjectAccess tsysObjectAccess { get; set; }
    }

Appreciate your help.

Thanks Roopesh

[spurdata]

See http://stackoverflow.com/questions/10324526/restsharp-not-deserializing-json-object-list-always-null

After you declare your request, try adding a line to explicitly specify the content type as JSON:

var request = new RestRequest(Method.GET);
request.OnBeforeDeserialization = resp => { resp.ContentType = "application/json"; };

Worked for me.

[alexeyzimarev]

SimpleJson serialization will not be amended because it is not our code.