public virtual void AssociateWithTreeViewItems() { TreeViewItemCheckBox c1 = new TreeViewItemCheckBox { Content = "First" }; TreeViewItemCheckBox c2 = new TreeViewItemCheckBox { Content = "Second" }; TreeViewItemCheckBox c3 = new TreeViewItemCheckBox { Content = "Third" }; TreeViewItemCheckBox c4 = new TreeViewItemCheckBox { Content = "Fourth" }; TreeViewItemCheckBox c5 = new TreeViewItemCheckBox { Content = "Fifth" }; TreeViewItem t1, t2, t3, t4, t5; TreeView view = new TreeViewBuilder() .Items(c1).Expand().Named(out t1) .Items(c2).Expand().Named(out t2) .Item(c3).Expand().Named(out t3).Set(t => t.SetIsChecked(true)) .Item(c4).Expand().Named(out t4) .EndItems() .EndItems() .Item(c5).Named(out t5).Set(t => t.SetIsChecked(true)); TestAsync( view, () => Assert.AreEqual(t1.GetIsChecked(), c1.IsChecked, "First didn't match!"), () => Assert.AreEqual(t2.GetIsChecked(), c2.IsChecked, "Second didn't match!"), () => Assert.AreEqual(t3.GetIsChecked(), c3.IsChecked, "Third didn't match!"), () => Assert.AreEqual(t4.GetIsChecked(), c4.IsChecked, "Fourth didn't match!"), () => Assert.AreEqual(t5.GetIsChecked(), c5.IsChecked, "Fifth didn't match!")); }