is ok an int pivotal keyedcollection

often times i need collection non-sequential objects numeric identifiers. i controlling keyedcollection this, nonetheless i cruise there's critical drawback. an int key, longer opening members collection index (collection[index] unequivocally collection[key]). critical adequate problem prevaricate controlling int key? preferable choice be? (maybe int.tostring()?)

i've finished before but any vital problems, nonetheless recently i strike nasty separator where xml serialization opposing keyedcollection does not work pivotal an int, due .