From a9f18787bae0c4a744770c54521d3b446169b3bc Mon Sep 17 00:00:00 2001
From: Justin Van Patten <jvp@justinvp.com>
Date: Wed, 7 Dec 2016 18:05:32 -0800
Subject: [PATCH] Avoid allocating in TimeZoneInfo.GetHashCode()

Avoid the intermediate ToUpper string allocation.
---
 src/mscorlib/src/System/TimeZoneInfo.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mscorlib/src/System/TimeZoneInfo.cs b/src/mscorlib/src/System/TimeZoneInfo.cs
index 85f28ca67685..8d91c4a7802e 100644
--- a/src/mscorlib/src/System/TimeZoneInfo.cs
+++ b/src/mscorlib/src/System/TimeZoneInfo.cs
@@ -973,7 +973,7 @@ static public TimeZoneInfo FromSerializedString(string source) {
         // GetHashCode -
         //
         public override int GetHashCode() {
-            return m_id.ToUpper(CultureInfo.InvariantCulture).GetHashCode();
+            return StringComparer.OrdinalIgnoreCase.GetHashCode(m_id);
         }
 
         //