Count number of records in a table in AX 2012

static void Query_cntRecords(Args _args)
{
    Query                query = new Query();
    QueryRun             queryRun;
    QueryBuildDataSource qbd;
    ;
    qbd = query.addDataSource(tablenum(CustTable));
    queryRun = new QueryRun(query);
    info(strfmt("Total Records in Query %1",SysQuery::countTotal(queryRun)));
}