From a24ae8bd162ca12ee5582eee1d3f13ad3cb7d49d Mon Sep 17 00:00:00 2001
From: John Luo <jt.luo@mail.utoronto.ca>
Date: Mon, 20 Nov 2017 17:19:50 -0800
Subject: [PATCH] Typo while correcting for feedback

---
 .../Internal/StringBuilderExtensions.cs                         | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Microsoft.AspNetCore.ResponseCaching/Internal/StringBuilderExtensions.cs b/src/Microsoft.AspNetCore.ResponseCaching/Internal/StringBuilderExtensions.cs
index d533fbf870..98cfa7e172 100644
--- a/src/Microsoft.AspNetCore.ResponseCaching/Internal/StringBuilderExtensions.cs
+++ b/src/Microsoft.AspNetCore.ResponseCaching/Internal/StringBuilderExtensions.cs
@@ -9,7 +9,7 @@ namespace Microsoft.AspNetCore.ResponseCaching.Internal
     {
         internal static StringBuilder AppendUpperInvariant(this StringBuilder builder, string value)
         {
-            if (string.IsNullOrEmpty(value))
+            if (!string.IsNullOrEmpty(value))
             {
                 builder.EnsureCapacity(builder.Length + value.Length);
                 for (var i = 0; i < value.Length; i++)