try this
DataTable DT = new DataTable();
DT.Clear();
DT.Columns.Add("نام");
DT.Columns.Add("نام خانوادگی");
DataTable dtNew = db.TblUsers.Where(x => x.Id != 0).Select(k => { var row = DT.NewRow(); row.ItemArray = new object[] { k.Name, k.Family }; return row; }).CopyToDataTable();