I did it like this:
myTreeView.Nodes[foo] = newTreeNode.Clone(); // this doesn't work
I am wondering, how to do it right ?
EDIT: I am thinking about delete old and insert new tree node.
Try this:
TreeNode node = myTreeView.Nodes[foo];
int index = myTreeView.Nodes.IndexOf(node);
myTreeView.Nodes.RemoveAt(index);
myTreeView.Nodes.Insert(index, newTreeNode);
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