public void ExtensionMethods()
{
System.Windows.Controls.TreeView tv =
new System.Windows.Controls.TreeView();
TreeModel <string> tm = new TreeModel <string>("",
new List <TreeModel <string> >()
{
new TreeModel <string>("section 1",
new List <TreeModel <string> >()
{
new TreeModel <string>("sec1item1"),
new TreeModel <string>("sec1item2")
}),
new TreeModel <string>("section 2"),
});
tv.RestoreFromTreeModel(tm);
TreeModel <string> result = tv.SaveToTreeModel("");
Assert.AreEqual(tm, result);
}