From 02b2f3dc1527d3257a107a7a509ccbb1a5ef7cb9 Mon Sep 17 00:00:00 2001
From: Steven Kirk <grokys@gmail.com>
Date: Fri, 26 Jun 2020 13:08:23 +0200
Subject: [PATCH] Remove listeners backwards in case of duplicates.

---
 src/Avalonia.Layout/LayoutManager.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Avalonia.Layout/LayoutManager.cs b/src/Avalonia.Layout/LayoutManager.cs
index 4a2c95db5b..a4da887f2c 100644
--- a/src/Avalonia.Layout/LayoutManager.cs
+++ b/src/Avalonia.Layout/LayoutManager.cs
@@ -208,7 +208,7 @@ namespace Avalonia.Layout
         {
             if (_effectiveViewportChangedListeners is object)
             {
-                for (var i = 0; i < _effectiveViewportChangedListeners.Count; ++i)
+                for (var i = _effectiveViewportChangedListeners.Count - 1; i >= 0; --i)
                 {
                     if (_effectiveViewportChangedListeners[i].Listener == control)
                     {