fix ArgumentOutOfRangeException when using ToNotifyCollectionChanged …

…with ObservableDictionary #70
Cysharp · Sep 9, 2024 · b0bc7c2 · b0bc7c2
1 parent efec73f
commit b0bc7c2
Showing 1 changed file with 8 additions and 1 deletion.
diff --git a/src/ObservableCollections/SynchronizedViewList.cs b/src/ObservableCollections/SynchronizedViewList.cs
@@ -259,7 +259,14 @@ private void Parent_ViewChanged(in SynchronizedViewChangedEventArgs<T, TView> e)
                 case NotifyCollectionChangedAction.Add: // Add or Insert
                     if (e.IsSingleItem)
                     {
-                        listView.Insert(e.NewStartingIndex, e.NewItem.View);
+                        if (e.NewStartingIndex == -1)
+                        {
+                            listView.Add(e.NewItem.View);
+                        }
+                        else
+                        {
+                            listView.Insert(e.NewStartingIndex, e.NewItem.View);
+                        }
                     }
                     else
                     {