这个很难，因为我必须发布很多源代码。但也许有人遇到过类似的问题。
最近我的代码中有NullReferenceException，我开始调试以检查是什么导致了它。这就是我发现的：
NRE，很多内部WPF的东西和底部的某个方法，它（有效地）改变了控件的DataContext。 绑定器正在调用setter。绑定如下所示：
<MyControl SelectedClass="{Binding BaseClass, Mode=TwoWay}" />
将null值设置为viewmodel的BaseClass属性，这会导致问题，因为它永远不会得到空值。
由于DataContext更改，绑定会刷新值，大部分可能是。但是，DataContext更改为非空值。
我检查了Binding，它负责设置这个空值：
(BindingOperations.GetBindingExpression(((MyEditor)(VisualTreeHelper.GetChild(editor.Children[0], 0))).cbBaseClass, MyControl.SelectedClassProperty)).ParentBinding
{System.Windows.Data.Binding}
base: {System.Windows.Data.Binding}
AsyncState: null
BindsDirectlyToSource: false
Converter: {DebugConverter}
ConverterCulture: null
ConverterParameter: null
ElementName: null
IsAsync: false
Mode: TwoWay
NotifyOnSourceUpdated: false
NotifyOnTargetUpdated: false
NotifyOnValidationError: false
Path: {System.Windows.PropertyPath}
RelativeSource: null
Source: null
UpdateSourceExceptionFilter: null
UpdateSourceTrigger: Default
ValidatesOnDataErrors: false
ValidatesOnExceptions: false
ValidatesOnNotifyDataErrors: true
ValidationRules: Count = 0
XPath: null
现在的问题是：绑定向源发送空值的可能原因是什么？好的，DataContext正在更改，但值将转到 previous DataContext。
以下是导致DataContext更改的操作与我的DebugConverter之间的调用堆栈帧，后者在setter之前立即触发。
<Debug converter fires>
PresentationFramework.dll!System.Windows.Data.BindingExpression.ConvertProposedValue(object value) Unknown
PresentationFramework.dll!System.Windows.Data.BindingExpressionBase.UpdateValue() Unknown
PresentationFramework.dll!System.Windows.Data.BindingExpression.UpdateOverride() Unknown
PresentationFramework.dll!System.Windows.Data.BindingExpressionBase.Update() Unknown
PresentationFramework.dll!System.Windows.Data.BindingExpressionBase.ProcessDirty() Unknown
PresentationFramework.dll!System.Windows.Data.BindingExpressionBase.Dirty() Unknown
PresentationFramework.dll!System.Windows.Data.BindingExpressionBase.SetValue(System.Windows.DependencyObject d, System.Windows.DependencyProperty dp, object value) Unknown
WindowsBase.dll!System.Windows.DependencyObject.SetValueCommon(System.Windows.DependencyProperty dp, object value, System.Windows.PropertyMetadata metadata, bool coerceWithDeferredReference, bool coerceWithCurrentValue, System.Windows.OperationType operationType, bool isInternal) Unknown
WindowsBase.dll!System.Windows.DependencyObject.SetValue(System.Windows.DependencyProperty dp, object value) Unknown
PresentationFramework.dll!MS.Internal.Data.PropertyPathWorker.SetValue(object item, object value) Unknown
PresentationFramework.dll!MS.Internal.Data.ClrBindingWorker.UpdateValue(object value) Unknown
PresentationFramework.dll!System.Windows.Data.BindingExpression.UpdateSource(object value) Unknown
PresentationFramework.dll!System.Windows.Data.BindingExpressionBase.UpdateValue() Unknown
PresentationFramework.dll!System.Windows.Data.BindingExpression.UpdateOverride() Unknown
PresentationFramework.dll!System.Windows.Data.BindingExpressionBase.Update() Unknown
PresentationFramework.dll!System.Windows.Data.BindingExpressionBase.ProcessDirty() Unknown
PresentationFramework.dll!System.Windows.Data.BindingExpressionBase.Dirty() Unknown
PresentationFramework.dll!System.Windows.Data.BindingExpressionBase.SetValue(System.Windows.DependencyObject d, System.Windows.DependencyProperty dp, object value) Unknown
WindowsBase.dll!System.Windows.DependencyObject.SetValueCommon(System.Windows.DependencyProperty dp, object value, System.Windows.PropertyMetadata metadata, bool coerceWithDeferredReference, bool coerceWithCurrentValue, System.Windows.OperationType operationType, bool isInternal) Unknown
WindowsBase.dll!System.Windows.DependencyObject.SetCurrentValueInternal(System.Windows.DependencyProperty dp, object value) Unknown
PresentationFramework.dll!System.Windows.Controls.Primitives.Selector.UpdatePublicSelectionProperties() Unknown
PresentationFramework.dll!System.Windows.Controls.Primitives.Selector.SelectionChanger.End() Unknown
PresentationFramework.dll!System.Windows.Controls.Primitives.Selector.OnItemsChanged(System.Collections.Specialized.NotifyCollectionChangedEventArgs e) Unknown
PresentationFramework.dll!System.Windows.Controls.ItemsControl.OnItemCollectionChanged2(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e) Unknown
PresentationFramework.dll!System.Windows.Data.CollectionView.OnCollectionChanged(System.Collections.Specialized.NotifyCollectionChangedEventArgs args) Unknown
PresentationFramework.dll!System.Windows.Controls.ItemCollection.OnViewCollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e) Unknown
WindowsBase.dll!System.Windows.WeakEventManager.ListenerList<System.Collections.Specialized.NotifyCollectionChangedEventArgs>.DeliverEvent(object sender, System.EventArgs e, System.Type managerType) Unknown
WindowsBase.dll!System.Windows.WeakEventManager.DeliverEvent(object sender, System.EventArgs args) Unknown
WindowsBase.dll!System.Collections.Specialized.CollectionChangedEventManager.OnCollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs args) Unknown
PresentationFramework.dll!System.Windows.Data.CollectionView.OnCollectionChanged(System.Collections.Specialized.NotifyCollectionChangedEventArgs args) Unknown
PresentationFramework.dll!System.Windows.Data.ListCollectionView.RefreshOverride() Unknown
PresentationFramework.dll!System.Windows.Data.CollectionView.RefreshInternal() Unknown
PresentationFramework.dll!System.Windows.Data.CollectionView.Refresh() Unknown
PresentationFramework.dll!System.Windows.Data.CollectionView.EndDefer() Unknown
PresentationFramework.dll!System.Windows.Data.CollectionView.DeferHelper.Dispose() Unknown
PresentationFramework.dll!System.Windows.Controls.ItemCollection.SetCollectionView(System.Windows.Data.CollectionView view) Unknown
PresentationFramework.dll!System.Windows.Controls.ItemCollection.SetItemsSource(System.Collections.IEnumerable value, System.Func<object,object> GetSourceItem) Unknown
PresentationFramework.dll!System.Windows.Controls.ItemsControl.OnItemsSourceChanged(System.Windows.DependencyObject d, System.Windows.DependencyPropertyChangedEventArgs e) Unknown
WindowsBase.dll!System.Windows.DependencyObject.OnPropertyChanged(System.Windows.DependencyPropertyChangedEventArgs e) Unknown
PresentationFramework.dll!System.Windows.FrameworkElement.OnPropertyChanged(System.Windows.DependencyPropertyChangedEventArgs e) Unknown
WindowsBase.dll!System.Windows.DependencyObject.NotifyPropertyChange(System.Windows.DependencyPropertyChangedEventArgs args) Unknown
WindowsBase.dll!System.Windows.DependencyObject.UpdateEffectiveValue(System.Windows.EntryIndex entryIndex, System.Windows.DependencyProperty dp, System.Windows.PropertyMetadata metadata, System.Windows.EffectiveValueEntry oldEntry, ref System.Windows.EffectiveValueEntry newEntry, bool coerceWithDeferredReference, bool coerceWithCurrentValue, System.Windows.OperationType operationType) Unknown
WindowsBase.dll!System.Windows.DependencyObject.InvalidateProperty(System.Windows.DependencyProperty dp, bool preserveCurrentValue) Unknown
PresentationFramework.dll!System.Windows.Data.BindingExpressionBase.Invalidate(bool isASubPropertyChange) Unknown
PresentationFramework.dll!System.Windows.Data.BindingExpression.TransferValue(object newValue, bool isASubPropertyChange) Unknown
PresentationFramework.dll!System.Windows.Data.BindingExpression.ScheduleTransfer(bool isASubPropertyChange) Unknown
PresentationFramework.dll!MS.Internal.Data.ClrBindingWorker.NewValueAvailable(bool dependencySourcesChanged, bool initialValue, bool isASubPropertyChange) Unknown
PresentationFramework.dll!MS.Internal.Data.PropertyPathWorker.UpdateSourceValueState(int k, System.ComponentModel.ICollectionView collectionView, object newValue, bool isASubPropertyChange) Unknown
PresentationFramework.dll!MS.Internal.Data.PropertyPathWorker.OnDependencyPropertyChanged(System.Windows.DependencyObject d, System.Windows.DependencyProperty dp, bool isASubPropertyChange) Unknown
PresentationFramework.dll!MS.Internal.Data.ClrBindingWorker.OnSourceInvalidation(System.Windows.DependencyObject d, System.Windows.DependencyProperty dp, bool isASubPropertyChange) Unknown
PresentationFramework.dll!System.Windows.Data.BindingExpression.HandlePropertyInvalidation(System.Windows.DependencyObject d, System.Windows.DependencyPropertyChangedEventArgs args) Unknown
PresentationFramework.dll!System.Windows.Data.BindingExpressionBase.OnPropertyInvalidation(System.Windows.DependencyObject d, System.Windows.DependencyPropertyChangedEventArgs args) Unknown
PresentationFramework.dll!System.Windows.Data.BindingExpression.OnPropertyInvalidation(System.Windows.DependencyObject d, System.Windows.DependencyPropertyChangedEventArgs args) Unknown
WindowsBase.dll!System.Windows.DependentList.InvalidateDependents(System.Windows.DependencyObject source, System.Windows.DependencyPropertyChangedEventArgs sourceArgs) Unknown
WindowsBase.dll!System.Windows.DependencyObject.NotifyPropertyChange(System.Windows.DependencyPropertyChangedEventArgs args) Unknown
WindowsBase.dll!System.Windows.DependencyObject.UpdateEffectiveValue(System.Windows.EntryIndex entryIndex, System.Windows.DependencyProperty dp, System.Windows.PropertyMetadata metadata, System.Windows.EffectiveValueEntry oldEntry, ref System.Windows.EffectiveValueEntry newEntry, bool coerceWithDeferredReference, bool coerceWithCurrentValue, System.Windows.OperationType operationType) Unknown
WindowsBase.dll!System.Windows.DependencyObject.InvalidateProperty(System.Windows.DependencyProperty dp, bool preserveCurrentValue) Unknown
PresentationFramework.dll!System.Windows.Data.BindingExpressionBase.Invalidate(bool isASubPropertyChange) Unknown
PresentationFramework.dll!System.Windows.Data.BindingExpression.TransferValue(object newValue, bool isASubPropertyChange) Unknown
PresentationFramework.dll!System.Windows.Data.BindingExpression.Activate(object item) Unknown
PresentationFramework.dll!System.Windows.Data.BindingExpression.OnDataContextChanged(System.Windows.DependencyObject contextElement) Unknown
PresentationFramework.dll!System.Windows.Data.BindingExpression.HandlePropertyInvalidation(System.Windows.DependencyObject d, System.Windows.DependencyPropertyChangedEventArgs args) Unknown
PresentationFramework.dll!System.Windows.Data.BindingExpressionBase.OnPropertyInvalidation(System.Windows.DependencyObject d, System.Windows.DependencyPropertyChangedEventArgs args) Unknown
PresentationFramework.dll!System.Windows.Data.BindingExpression.OnPropertyInvalidation(System.Windows.DependencyObject d, System.Windows.DependencyPropertyChangedEventArgs args) Unknown
WindowsBase.dll!System.Windows.DependentList.InvalidateDependents(System.Windows.DependencyObject source, System.Windows.DependencyPropertyChangedEventArgs sourceArgs) Unknown
WindowsBase.dll!System.Windows.DependencyObject.NotifyPropertyChange(System.Windows.DependencyPropertyChangedEventArgs args) Unknown
WindowsBase.dll!System.Windows.DependencyObject.UpdateEffectiveValue(System.Windows.EntryIndex entryIndex, System.Windows.DependencyProperty dp, System.Windows.PropertyMetadata metadata, System.Windows.EffectiveValueEntry oldEntry, ref System.Windows.EffectiveValueEntry newEntry, bool coerceWithDeferredReference, bool coerceWithCurrentValue, System.Windows.OperationType operationType) Unknown
PresentationFramework.dll!System.Windows.TreeWalkHelper.OnInheritablePropertyChanged(System.Windows.DependencyObject d, System.Windows.InheritablePropertyChangeInfo info, bool visitedViaVisualTree) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>._VisitNode(System.Windows.DependencyObject d, bool visitedViaVisualTree) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.VisitNode(System.Windows.FrameworkElement fe, bool visitedViaVisualTree) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.VisitNode(System.Windows.DependencyObject d, bool visitedViaVisualTree) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.WalkLogicalChildren(System.Windows.FrameworkElement feParent, System.Windows.FrameworkContentElement fceParent, System.Collections.IEnumerator logicalChildren) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.WalkFrameworkElementLogicalThenVisualChildren(System.Windows.FrameworkElement feParent, bool hasLogicalChildren) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.IterateChildren(System.Windows.DependencyObject d) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>._VisitNode(System.Windows.DependencyObject d, bool visitedViaVisualTree) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.VisitNode(System.Windows.FrameworkElement fe, bool visitedViaVisualTree) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.VisitNode(System.Windows.DependencyObject d, bool visitedViaVisualTree) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.WalkLogicalChildren(System.Windows.FrameworkElement feParent, System.Windows.FrameworkContentElement fceParent, System.Collections.IEnumerator logicalChildren) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.WalkFrameworkElementLogicalThenVisualChildren(System.Windows.FrameworkElement feParent, bool hasLogicalChildren) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.IterateChildren(System.Windows.DependencyObject d) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>._VisitNode(System.Windows.DependencyObject d, bool visitedViaVisualTree) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.VisitNode(System.Windows.FrameworkElement fe, bool visitedViaVisualTree) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.VisitNode(System.Windows.DependencyObject d, bool visitedViaVisualTree) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.WalkLogicalChildren(System.Windows.FrameworkElement feParent, System.Windows.FrameworkContentElement fceParent, System.Collections.IEnumerator logicalChildren) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.WalkFrameworkElementLogicalThenVisualChildren(System.Windows.FrameworkElement feParent, bool hasLogicalChildren) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.IterateChildren(System.Windows.DependencyObject d) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>._VisitNode(System.Windows.DependencyObject d, bool visitedViaVisualTree) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.VisitNode(System.Windows.FrameworkElement fe, bool visitedViaVisualTree) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.VisitNode(System.Windows.DependencyObject d, bool visitedViaVisualTree) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.WalkLogicalChildren(System.Windows.FrameworkElement feParent, System.Windows.FrameworkContentElement fceParent, System.Collections.IEnumerator logicalChildren) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.WalkFrameworkElementLogicalThenVisualChildren(System.Windows.FrameworkElement feParent, bool hasLogicalChildren) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.IterateChildren(System.Windows.DependencyObject d) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>._VisitNode(System.Windows.DependencyObject d, bool visitedViaVisualTree) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.VisitNode(System.Windows.FrameworkElement fe, bool visitedViaVisualTree) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.VisitNode(System.Windows.DependencyObject d, bool visitedViaVisualTree) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.WalkLogicalChildren(System.Windows.FrameworkElement feParent, System.Windows.FrameworkContentElement fceParent, System.Collections.IEnumerator logicalChildren) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.WalkFrameworkElementLogicalThenVisualChildren(System.Windows.FrameworkElement feParent, bool hasLogicalChildren) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.IterateChildren(System.Windows.DependencyObject d) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>._VisitNode(System.Windows.DependencyObject d, bool visitedViaVisualTree) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.VisitNode(System.Windows.FrameworkElement fe, bool visitedViaVisualTree) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.VisitNode(System.Windows.DependencyObject d, bool visitedViaVisualTree) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.WalkLogicalChildren(System.Windows.FrameworkElement feParent, System.Windows.FrameworkContentElement fceParent, System.Collections.IEnumerator logicalChildren) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.WalkFrameworkElementLogicalThenVisualChildren(System.Windows.FrameworkElement feParent, bool hasLogicalChildren) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.IterateChildren(System.Windows.DependencyObject d) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>._VisitNode(System.Windows.DependencyObject d, bool visitedViaVisualTree) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.VisitNode(System.Windows.FrameworkElement fe, bool visitedViaVisualTree) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.VisitNode(System.Windows.DependencyObject d, bool visitedViaVisualTree) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.WalkLogicalChildren(System.Windows.FrameworkElement feParent, System.Windows.FrameworkContentElement fceParent, System.Collections.IEnumerator logicalChildren) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.WalkFrameworkElementLogicalThenVisualChildren(System.Windows.FrameworkElement feParent, bool hasLogicalChildren) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.IterateChildren(System.Windows.DependencyObject d) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>._VisitNode(System.Windows.DependencyObject d, bool visitedViaVisualTree) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.VisitNode(System.Windows.FrameworkElement fe, bool visitedViaVisualTree) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.VisitNode(System.Windows.DependencyObject d, bool visitedViaVisualTree) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.WalkLogicalChildren(System.Windows.FrameworkElement feParent, System.Windows.FrameworkContentElement fceParent, System.Collections.IEnumerator logicalChildren) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.WalkFrameworkElementLogicalThenVisualChildren(System.Windows.FrameworkElement feParent, bool hasLogicalChildren) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.IterateChildren(System.Windows.DependencyObject d) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>._VisitNode(System.Windows.DependencyObject d, bool visitedViaVisualTree) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.VisitNode(System.Windows.FrameworkElement fe, bool visitedViaVisualTree) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.VisitNode(System.Windows.DependencyObject d, bool visitedViaVisualTree) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.WalkFrameworkElementLogicalThenVisualChildren(System.Windows.FrameworkElement feParent, bool hasLogicalChildren) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.IterateChildren(System.Windows.DependencyObject d) Unknown
PresentationFramework.dll!System.Windows.DescendentsWalker<System.Windows.InheritablePropertyChangeInfo>.StartWalk(System.Windows.DependencyObject startNode, bool skipStartNode) Unknown
PresentationFramework.dll!System.Windows.FrameworkElement.OnPropertyChanged(System.Windows.DependencyPropertyChangedEventArgs e) Unknown
WindowsBase.dll!System.Windows.DependencyObject.NotifyPropertyChange(System.Windows.DependencyPropertyChangedEventArgs args) Unknown
WindowsBase.dll!System.Windows.DependencyObject.UpdateEffectiveValue(System.Windows.EntryIndex entryIndex, System.Windows.DependencyProperty dp, System.Windows.PropertyMetadata metadata, System.Windows.EffectiveValueEntry oldEntry, ref System.Windows.EffectiveValueEntry newEntry, bool coerceWithDeferredReference, bool coerceWithCurrentValue, System.Windows.OperationType operationType) Unknown
WindowsBase.dll!System.Windows.DependencyObject.SetValueCommon(System.Windows.DependencyProperty dp, object value, System.Windows.PropertyMetadata metadata, bool coerceWithDeferredReference, bool coerceWithCurrentValue, System.Windows.OperationType operationType, bool isInternal) Unknown
WindowsBase.dll!System.Windows.DependencyObject.SetValue(System.Windows.DependencyProperty dp, object value) Unknown
PresentationFramework.dll!System.Windows.Controls.ContentPresenter.OnContentChanged(System.Windows.DependencyObject d, System.Windows.DependencyPropertyChangedEventArgs e) Unknown
WindowsBase.dll!System.Windows.DependencyObject.OnPropertyChanged(System.Windows.DependencyPropertyChangedEventArgs e) Unknown
PresentationFramework.dll!System.Windows.FrameworkElement.OnPropertyChanged(System.Windows.DependencyPropertyChangedEventArgs e) Unknown
WindowsBase.dll!System.Windows.DependencyObject.NotifyPropertyChange(System.Windows.DependencyPropertyChangedEventArgs args) Unknown
WindowsBase.dll!System.Windows.DependencyObject.UpdateEffectiveValue(System.Windows.EntryIndex entryIndex, System.Windows.DependencyProperty dp, System.Windows.PropertyMetadata metadata, System.Windows.EffectiveValueEntry oldEntry, ref System.Windows.EffectiveValueEntry newEntry, bool coerceWithDeferredReference, bool coerceWithCurrentValue, System.Windows.OperationType operationType) Unknown
WindowsBase.dll!System.Windows.DependencyObject.InvalidateProperty(System.Windows.DependencyProperty dp, bool preserveCurrentValue) Unknown
PresentationFramework.dll!System.Windows.Data.BindingExpressionBase.Invalidate(bool isASubPropertyChange) Unknown
PresentationFramework.dll!System.Windows.Data.BindingExpression.TransferValue(object newValue, bool isASubPropertyChange) Unknown
PresentationFramework.dll!System.Windows.Data.BindingExpression.ScheduleTransfer(bool isASubPropertyChange) Unknown
PresentationFramework.dll!MS.Internal.Data.ClrBindingWorker.NewValueAvailable(bool dependencySourcesChanged, bool initialValue, bool isASubPropertyChange) Unknown
PresentationFramework.dll!MS.Internal.Data.PropertyPathWorker.UpdateSourceValueState(int k, System.ComponentModel.ICollectionView collectionView, object newValue, bool isASubPropertyChange) Unknown
PresentationFramework.dll!MS.Internal.Data.ClrBindingWorker.OnSourcePropertyChanged(object o, string propName) Unknown
PresentationFramework.dll!MS.Internal.Data.PropertyPathWorker.OnPropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e) Unknown
WindowsBase.dll!System.Windows.WeakEventManager.ListenerList<System.ComponentModel.PropertyChangedEventArgs>.DeliverEvent(object sender, System.EventArgs e, System.Type managerType) Unknown
WindowsBase.dll!System.ComponentModel.PropertyChangedEventManager.OnPropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs args) Unknown
<DataContext change>