query to replace values from datagridveiw

DataTable dt = new DataTable();
        dt.Columns.Add("Name");
        DataRow dr = dt.NewRow();
        dr["Name"] = '"' + "INC0067889" + '"';
        dt.Rows.Add(dr);

        DataTable dtNew = new DataTable();
        dtNew = dt.Clone();
        char replace = ' ';
        foreach (DataRow d in dt.Rows)
        {
            DataRow dRow = dtNew.NewRow();
            dRow["Name"] = d["Name"].ToString().Replace('"', replace).ToString();
            dtNew.Rows.Add(dRow);
        }