diff --git a/csharp/parallel/ParallelExtensionsExtras/CoordinationDataStructures/ObservableConcurrentDictionary.cs b/csharp/parallel/ParallelExtensionsExtras/CoordinationDataStructures/ObservableConcurrentDictionary.cs
index c151b698a55..6acd96a6fa5 100644
--- a/csharp/parallel/ParallelExtensionsExtras/CoordinationDataStructures/ObservableConcurrentDictionary.cs
+++ b/csharp/parallel/ParallelExtensionsExtras/CoordinationDataStructures/ObservableConcurrentDictionary.cs
@@ -50,6 +50,7 @@ private void NotifyObserversOfChange()
             {
                 collectionHandler?.Invoke(this, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
                 propertyHandler?.Invoke(this, new PropertyChangedEventArgs("Count"));
+                propertyHandler?.Invoke(this, new PropertyChangedEventArgs("Item[]"));
                 propertyHandler?.Invoke(this, new PropertyChangedEventArgs(nameof(Keys)));
                 propertyHandler?.Invoke(this, new PropertyChangedEventArgs(nameof(Values)));
             }, null);