From 63e818b2fed8c4c9797f04176808819484acb9a8 Mon Sep 17 00:00:00 2001
From: jacalvar <jacalvar@microsoft.com>
Date: Wed, 2 Mar 2016 14:21:29 -0800
Subject: [PATCH] [Fixes #4204] React to changes in Localization.

---
 .../Internal/MvcLocalizationServices.cs               | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/Microsoft.AspNetCore.Mvc.Localization/Internal/MvcLocalizationServices.cs b/src/Microsoft.AspNetCore.Mvc.Localization/Internal/MvcLocalizationServices.cs
index e40d71783c..13951ed3ab 100644
--- a/src/Microsoft.AspNetCore.Mvc.Localization/Internal/MvcLocalizationServices.cs
+++ b/src/Microsoft.AspNetCore.Mvc.Localization/Internal/MvcLocalizationServices.cs
@@ -17,8 +17,15 @@ namespace Microsoft.AspNetCore.Mvc.Localization.Internal
             Action<LocalizationOptions> setupAction)
         {
             AddMvcLocalizationServices(services, format, setupAction);
-
-            services.AddLocalization(setupAction);
+            
+            if (setupAction == null)
+            {
+                services.AddLocalization();
+            }
+            else
+            {
+                services.AddLocalization(setupAction);
+            }
         }
 
         // To enable unit testing only 'MVC' specific services