Refactor code.

Author: CodingOctocat

README.md

@@ -1,6 +1,6 @@
 # WpfObservableRangeCollection
 
-Provides ObservableRangeCollection and its WPF version, including AddRange, RemoveRange, Replace/ReplaceRange methods for bulk operation, but only update the notification once.
+Provides ObservableRangeCollection and its WPF version, including AddRange, InsertRange, RemoveRange, Replace/ReplaceRange methods for bulk operation, but only update the notification once.
 
 ---
 
@@ -10,7 +10,7 @@ Provides ObservableRangeCollection and its WPF version, including AddRange, Remo
 
 ## Classes
 - `ObservableRangeCollection`: Represents a dynamic data collection that provides notifications when items get added, removed, or when the whole list is refreshed.
-  > Forked from [XamarinCommunityToolkit/src/CommunityToolkit/Xamarin.CommunityToolkit/ObjectModel/ObservableRangeCollection.shared.cs](https://github.com/xamarin/XamarinCommunityToolkit/blob/main/src/CommunityToolkit/Xamarin.CommunityToolkit/ObjectModel/ObservableRangeCollection.shared.cs)
+  > Forked from [weitzhandler/rangeobservablecollection-cs](https://gist.github.com/weitzhandler/65ac9113e31d12e697cb58cd92601091#file-rangeobservablecollection-cs)
 
 - `WpfObservableRangeCollection`: Wpf version of ObservableRangeCollection with CollectionView support.
   > Forked from [weitzhandler/wpfobservablerangecollection-cs](https://gist.github.com/weitzhandler/65ac9113e31d12e697cb58cd92601091#file-wpfobservablerangecollection-cs)
@@ -20,13 +20,14 @@ See [ObservableCollection Doesn't support AddRange method, so I get notified for
 
 I've searched the web for some ObservableCollections that have *Range methods, but they all raise various exceptions(and some strange problems) in certain specific situations:
 - System.NotSupportedException: Range actions are not supported.
-- System.InvalidOperationException: The "2" index in the collection change event is not valid for collections of size "1".
+- System.InvalidOperationException: The "x" index in the collection change event is not valid for collections of size "y".
 - More? I'm not sure. I forgot.
 
 If the `NotSupportedException` still occurred, try using `BindingOperations.EnableCollectionSynchronization(IEnumerable, Object)`.
 
-In the end, I chose `XamarinCommunityToolkit/ObservableRangeCollection` and `weitzhandler/WpfObservableRangeCollection` and made slight changes to the code, and finally, I didn't encounter any problems, for now.
+In the end, I chose `weitzhandler/RangeObservableCollection` and `weitzhandler/WpfObservableRangeCollection` and made slight changes to the code, and finally, I didn't encounter any problems, for now.
 
 ## Seealso
-- [weitzhandler/RangeObservableCollection.cs - Gist](https://gist.github.com/weitzhandler/65ac9113e31d12e697cb58cd92601091)
-  - [My comment](https://gist.github.com/weitzhandler/65ac9113e31d12e697cb58cd92601091?permalink_comment_id=4634920#gistcomment-4634920)
+- [Cysharp/ObservableCollections](https://github.com/Cysharp/ObservableCollections)
+- [ENikS/ObservableCollectionEx](https://github.com/ENikS/ObservableCollectionEx)
+- [XamarinCommunityToolkit/src/CommunityToolkit/Xamarin.CommunityToolkit/ObjectModel/ObservableRangeCollection.shared.cs](https://github.com/xamarin/XamarinCommunityToolkit/blob/main/src/CommunityToolkit/Xamarin.CommunityToolkit/ObjectModel/ObservableRangeCollection.shared.cs)