From e9c53a9f2a91e33e9635cc3ce320f1205ed4d2a4 Mon Sep 17 00:00:00 2001
From: Ilya <darpa@yandex.ru>
Date: Sat, 1 Sep 2018 01:57:19 +0500
Subject: [PATCH] Optimize RemoveAt() method in OrderedDictionary class
 (dotnet/corefx#32044)

Commit migrated from https://github.com/dotnet/corefx/commit/243e24c32fd587f046b23b9770fb811c962aaeed
---
 .../src/System/Collections/Specialized/OrderedDictionary.cs           | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/libraries/System.Collections.Specialized/src/System/Collections/Specialized/OrderedDictionary.cs b/src/libraries/System.Collections.Specialized/src/System/Collections/Specialized/OrderedDictionary.cs
index 1736bc4..efc32cf 100644
--- a/src/libraries/System.Collections.Specialized/src/System/Collections/Specialized/OrderedDictionary.cs
+++ b/src/libraries/System.Collections.Specialized/src/System/Collections/Specialized/OrderedDictionary.cs
@@ -367,8 +367,8 @@ namespace System.Collections.Specialized
             {
                 throw new ArgumentOutOfRangeException(nameof(index));
             }
-            EnsureObjectsTable();
-            EnsureObjectsArray();
+            // The 'index >= Count' check above ensures
+            // that the '_objectsArray' and '_objectsTable' objects are initialized.
             object key = ((DictionaryEntry)_objectsArray[index]).Key;
             _objectsArray.RemoveAt(index);
             _objectsTable.Remove(key);
-- 
2.7.4