OrderBy LINQ ASP.NET C#

 dtOpenVacancy.AsEnumerable().OrderByDescending(a => a.Field<int>("id"));

IF WANT TO USE WITH GRID DATABASE:-

dtOpenVacancy.AsEnumerable().OrderByDescending(a => a.Field<int>("id")).CopyToDataTable()

or

gridview

private void BindOpenVacancy()

        {

            DataTable dtOpenVacancy = Repository.GetAllOpenVacancy();

            if (dtOpenVacancy.Rows.Count > 0)

            {

                ViewState["vwOpenVacancy"] = dtOpenVacancy.AsEnumerable().OrderByDescending(a => a.Field<int>("id")).CopyToDataTable();

                grdOpenVacancy.DataSource = dtOpenVacancy.AsEnumerable().OrderByDescending(a => a.Field<int>("id")).CopyToDataTable(); 

            }

            grdOpenVacancy.DataBind();

        }

reference:- https://www.tutorialsteacher.com/linq/linq-sorting-operators-orderby-orderbydescending