From 5b502679ecc77fefb0054bc0637115cbe930e788 Mon Sep 17 00:00:00 2001
From: kawaiSky <x360623358@gmail.com>
Date: Wed, 20 Mar 2024 21:43:03 +0800
Subject: [PATCH] ObservableList Replace Bugfix

When replacing, the callback function should refer to the item in the array, rather than generating a new one.
---
 src/ObservableCollections/ObservableList.Views.cs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/ObservableCollections/ObservableList.Views.cs b/src/ObservableCollections/ObservableList.Views.cs
index 13f4d77..ae747ec 100644
--- a/src/ObservableCollections/ObservableList.Views.cs
+++ b/src/ObservableCollections/ObservableList.Views.cs
@@ -212,7 +212,7 @@ namespace ObservableCollections
                             // ObservableList does not support replace range
                         {
                             var v = (e.NewItem, selector(e.NewItem));
-                            var ov = (e.OldItem, selector(e.OldItem));
+                            var ov = (e.OldItem, list[e.OldStartingIndex].Item2);
                             list[e.NewStartingIndex] = v;
                             filter.InvokeOnReplace(v, ov, e.NewStartingIndex);
                             break;
@@ -240,4 +240,4 @@ namespace ObservableCollections
             }
         }
     }
-}
\ No newline at end of file
+}