From f99876dd2443ce92ed417ec95e35a1e113f6dbed Mon Sep 17 00:00:00 2001
From: stephentoub <stoub@microsoft.com>
Date: Sat, 6 Feb 2016 10:04:43 -0500
Subject: [PATCH] Tweak Enum.TryParse whitespace skipping slightly

As a simple addendum to my previous Enum.TryParse change, if the string
begins with whitespace, we already know where the whitespace ends, so we
don't need to retraverse it.
---
 src/mscorlib/src/System/Enum.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mscorlib/src/System/Enum.cs b/src/mscorlib/src/System/Enum.cs
index fa674e74cf12..b0e3bf8f07e9 100644
--- a/src/mscorlib/src/System/Enum.cs
+++ b/src/mscorlib/src/System/Enum.cs
@@ -428,7 +428,7 @@ private static bool TryParseEnum(Type enumType, String value, bool ignoreCase, r
                 StringComparison.OrdinalIgnoreCase : 
                 StringComparison.Ordinal;
 
-            int valueIndex = 0;
+            int valueIndex = firstNonWhitespaceIndex;
             while (valueIndex <= value.Length) // '=' is to handle invalid case of an ending comma
             {
                 // Find the next separator, if there is one, otherwise the end of the string.