How to detect if Treeview has TreeNodes or not (VB.Net/C#) -

how can know if treeview has treenodes, regardless of whether parent or child nodes? want avoid duplication. pseudo-code looks like:

if treeview1 has treenodes       'remove old ones , create       'or exit skep creation of new ones   else      'create treenodes   end sub  

you can check treeview1.nodes.count or can call treeview1.nodes.clear() ensure it's clear before add new ones

update more complete answer:

if treeview1.nodes.count = 0       'remove old ones , create       'or exit skep creation of new ones   else      'create treenodes   end sub