Как я могу...как я могу показать данные duplecate в ASP.NET MVC 5? Мне нужна ваша поддержка пожалуйста

<pre lang="c#"><pre>[HttpPost]
        public ActionResult CheckEmployee(Chart obj)
        {
            

            SqlConnection con = new SqlConnection(@"Data Source=MAHGOUBND4;Initial Catalog=CTC_Mahgoub;Persist Security Info=True;User ID=sa;Password=8008989;");
            SqlCommand cmd = new SqlCommand("SELECT * FROM cs INNER JOIN( select EmployeeName FROM cs GROUP BY EmployeeName  HAVING Count(*) > 1) " +
                " As DuplicateRows ON DuplicateRows.EmployeeName = cs.EmployeeName)",con);
            cmd.Parameters.AddWithValue("@EmployeeName", obj.EmployeeName);
            cmd.Parameters.AddWithValue("@DuplicateRows", obj.DuplicateRows);



            return Json( JsonRequestBehavior.AllowGet);
        }

<pre> @model Asp.NETMVCCRUD.Models.Chart
@{
    ViewBag.Title = "CTC";
}
<table id="employeeTable" class="table table-striped table-bordered" style="width:100%">
    <thead>
        <tr>
            <th>Employee Name</th>
            <th>Scour</th>
        </tr>
    </thead>
</table>
<link href="//cdn.datatables.net/1.10.15/css/jquery.dataTables.min.css" rel="stylesheet" />
<link href="https://cdn.datatables.net/buttons/1.3.1/css/buttons.dataTables.min.css" rel="stylesheet" />
<link href="https://cdn.datatables.net/1.10.15/css/dataTables.bootstrap.min.css" rel="stylesheet" />
<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet" />
@section scripts{
<script src="//cdn.datatables.net/1.10.15/js/jquery.dataTables.min.js"></script>
<script src="https://cdn.datatables.net/1.10.15/js/dataTables.bootstrap.min.js"></script>
<script src="https://cdn.datatables.net/1.10.15/js/dataTables.bootstrap.min.js"></script>

<script type="text/javascript">
    var Popup, dataTable;
    $(document).ready(function () {

        dataTable = $("#employeeTable").DataTable({

            "ajax": {
                "url": "/chart/CheckEmployee",
                "type": "GET",
                "datatype": "json"
            },
            "columns": [

                { "data": "EmployeeName", "name": "EmployeeName", "autoWidth": true },
                { "data": "DuplicateRows", "name": "DuplicateRows", "autoWidth": true },

            ],
            "orderable": false,
            "searchable": false,
            "width": "150px",
            "dom": "Bfrtip",
            
            "language": {

                "emptyTable": "No data found, Please click on Add New Button"
            }
        });
    });

</script>
}

DataTables warning: table id=employeeTable - Ajax error. For more information about this error, please see http://datatables.net/tn/7