vb.net strong-typed collection

i wish emanate collection vb.net, nonetheless i wholly wish accept objects certain type. example, i wish emanate category called "foocollection" acts collection each way, nonetheless wholly accepts objects form "foo".

i guess i controlling generics, controlling following syntax:

    open category foocollection(of form foo)
        inherits collectionbase

        ...

    finish class

but i an blunder i accumulate i "must exercise default accessor", clearly there's something missing. i don't wish mention form accepts i instantiate - i wish foocollection itself specific wholly accepts foo objects. i've seen finished c# strong-typed list, maybe i'm looking vb.net syntax.

thanks your help!

edit: interjection answer. it, nonetheless i wanted have classtype named certain way, i indeed achieved accurately i looking following code:

public category foocollection
    inherits list(of foo)

end class