XamlTest.XamlTestException : System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> Xunit.Sdk.EqualException: Assert.Equal() Failure: Collections differ ↓ (pos 0) Expected: <>z__ReadOnlySingleElementList<string> ["1"] Actual: SelectIListIterator<TreeItem, string> ["0"] ↑ (pos 0) at Xunit.Assert.Equal[T](T expected, T actual, IEqualityComparer`1 comparer) in /_/src/xunit.assert/Asserts/EqualityAsserts.cs:line 268 at Xunit.Assert.Equal[T](IEnumerable`1 expected, IEnumerable`1 actual) in /_/src/xunit.assert/Asserts/CollectionAsserts.cs:line 448 at MaterialDesignThemes.UITests.WPF.TreeListViews.TreeListViewTests.<TreeListView_AddingDuplicateItemsAndSelectingWithArrowKeys_SelectsEachItemInTurn>g__AssertSelectedItems|31_0(TreeListView treeListView, String expected) in D:\a\MaterialDesignInXamlToolkit\MaterialDesignInXamlToolkit\tests\MaterialDesignThemes.UITests\WPF\TreeListViews\TreeListViewTests.cs:line 1211 at InvokeStub_TreeListViewTests.<TreeListView_AddingDuplicateItemsAndSelectingWithArrowKeys_SelectsEachItemInTurn>g__AssertSelectedItems|31_0(Object, Span`1) at System.Reflection.MethodBaseInvoker.InvokeWithFewArgs(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) --- End of inner exception stack trace --- at System.Reflection.MethodBaseInvoker.InvokeWithFewArgs(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) at System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters) at XamlTest.Host.VisualTreeService.<>c__DisplayClass50_0.<RemoteInvocation>b__0()