i want to copy data from a list to a datatable.

protected void gv1_SelectedIndexChanging(object sender, GridViewSelectEventArgs e)
    {
        ModalPopupExtender1.Show();
        tb.Text = gv1.Rows[e.NewSelectedIndex].Cells[2].Text;
        tb1.Text = gv1.Rows[e.NewSelectedIndex].Cells[3].Text;
       

 IEnumerable<datarow> m = (from x in BAL.INSTANCE.disempdetails().AsEnumerable() where x.EID == Convert.ToInt32(gv1.Rows[e.NewSelectedIndex].Cells[2].Text) select new { x.DID, x.DNAME });</datarow>

        DataTable dt1 = new DataTable();
        dt1.Columns.Add("DID", typeof(string));
        dt1.Columns.Add("DNAME", typeof(string));
        m.CopyToDataTable(dt1, System.Data.LoadOption.PreserveChanges);
        gv.DataSource = m;
        gv.DataBind();
        ViewState["i"] = 1;
        tb1.Focus();
    }