Finding Table mandatory fields in AX 2012

static void MandatoryFields(Args _args)
{
    SysDictTable       dTable;
    SysDictField       dField;
    Counter         counter;
    ;
    dTable = new SysDictTable(tablenum(CustTable));
    for(counter =1; counter<= dTable.fieldCnt();counter++)
    {
        dField = new SysDictField(dTable.id(),dTable.fieldCnt2Id(counter));
        if(dField.mandatory())
        info(dField.name());
    }
}