aren't there any improved ways displaying an vigilant controlling hierarchy?

i have category hierarchy such:

        +-- virtualnode
        |
inode --+                  +-- sitenode
        |                  |
        +-- abstractnode --+
                           |
                           +-- sitesubnode

and analogous nodecollection category build inode. method arrangement nodecollection i need know final form any member. i need duty this

foreach (inode n mynodecollection)
{
    switch(n.gettype())
    {
        case(typeof(sitenode)):
        // arrangement n sitenode
    }
}

now, unequivocally an vigilant oriented proceed doing it. are there any patterns permitted ways doing same thing, your opinion?

edit

i already guess adding display render slight inode interface. side outcome coupling perspective model, i unequivocally avoid.