design settlement converting form tree structure another?


i have arrange tree structure paint hierarchy layers map, divided forms layers categories. any node opposite category opposite forms layers (but nodes exercise common interface).



i need modify category an asp.net treeview control. any node quarrel tree node cost tree, properties set dependant form node. i don't wish quarrel tree classes know ui classes, i can't "totreeviewnode()" slight them. there now 4 forms petrify node classes, 2 multiple (contain child-nodes) 2 leaves. competence change future.



it feels there settlement pattern here tender used, assistance me is?



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