Data Table Filtering In C#.Net

 Filtering  Datatable "dtItem" copy the table to "dt2"

 DataTable dtItem=new DataTable();
 DataTable dt2=new DataTable();

 DataRow[] drs = dtItem.Select("CategoryID =1 ");
            //make a new "results" datatable via clone to keep structure
            dt2 = dtItem.Clone();
            //Import the Rows
            foreach (DataRow d in drs)
            {
                dt2.ImportRow(d);
            }

            foreach (DataRow dr in dt2.Rows)
            {
              ItemNamecomboBox2.Items.Add(dr[1].ToString());
            }