[Gtk-sharp-list] Problem in using GtkTreeview

[lordphoenix]

I'm looking for the best way to browse a ListStore from first element
to last. 
It's a listore with one string and one bool per row and I need to make
treatment on each string wich corresponding boolean is true.

I've found a solution but I don't like it and it makes me to have
troubles in some particular case.

What kind of solution would you use?

PS : Sorry for ma bad English I don't speak it very often :)

Thanks for your help.
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