From caffb36ec26ff1a722974fca96818b03534e753a Mon Sep 17 00:00:00 2001
From: Roman Lytvyn <rider1493@gmail.com>
Date: Fri, 16 Sep 2016 10:35:14 +0300
Subject: [PATCH] U4-8956 PublicAccessEntry.ClearRules() triggers an unhandled
 exception

fixed System.InvalidOperationException (Collection was modified;
enumeration operation may not execute.) by reverse iterating the
collection.
---
 src/Umbraco.Core/Models/PublicAccessEntry.cs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Umbraco.Core/Models/PublicAccessEntry.cs b/src/Umbraco.Core/Models/PublicAccessEntry.cs
index 58e3b69394..4af6f9536a 100644
--- a/src/Umbraco.Core/Models/PublicAccessEntry.cs
+++ b/src/Umbraco.Core/Models/PublicAccessEntry.cs
@@ -107,9 +107,9 @@ namespace Umbraco.Core.Models
 
         public void ClearRules()
         {
-            foreach (var rule in _ruleCollection)
+            for (var i = _ruleCollection.Count - 1; i >= 0; i--)
             {
-                RemoveRule(rule);
+                RemoveRule(_ruleCollection[i]);
             }
         }