private static void Test_Command_QuoteIdentifier() { string query = "select id,name from t"; OleDbDataAdapter dataAdapter = new OleDbDataAdapter(query, conn); OleDbCommandBuilder commandBuilder = new OleDbCommandBuilder(dataAdapter); string sql_quote_conn = commandBuilder.QuoteIdentifier("select id,name from t", conn); Assert.AreEqual(sql_quote_conn, "\"select id,name from t\""); string sql_unquote_conn = commandBuilder.UnquoteIdentifier("\"select id,name from t\"", conn); Assert.AreEqual(sql_unquote_conn, "select id,name from t"); }