How to Select one Row from Dataset in C# Asp.net

protected void lnkbtnView_Click(object sender, System.EventArgs e)

    {

        DataTable dt = null;

        DataRow[] dr = null;

        LinkButton lnkbtn = (LinkButton)sender as LinkButton;

        //View State having the data

        if (ViewState["GetRecords"] != null)

        {

            dt = (DataTable)ViewState["GetRecords"];

            for (int i = 0; i < dt.Rows.Count; i++)

            {

                // dr = dt.Select("Sno = '" + lnkbtn.CommandArgument + "'");

                if (dt.Rows[i]["Sno"].ToString() == lnkbtn.CommandArgument.ToString())

                {

                }

                else

                {

                    dt.Rows.Remove(dt.Rows[i]);

                    dt.AcceptChanges();

                    i--;

                }

            }

            detailsView.DataSource = dt;

            detailsView.DataBind();

            Bind();

        }

    }