From b78330b21df8a53eee60f1b89d0cd515b90ca488 Mon Sep 17 00:00:00 2001
From: Sydney Acksman <obsidianminor@gmail.com>
Date: Sun, 5 May 2019 13:26:12 -0500
Subject: [PATCH] Fix RepeatedExtensionValue.IsInitialized

---
 csharp/src/Google.Protobuf/ExtensionValue.cs | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/csharp/src/Google.Protobuf/ExtensionValue.cs b/csharp/src/Google.Protobuf/ExtensionValue.cs
index 6b224ed441..986b2fce0d 100644
--- a/csharp/src/Google.Protobuf/ExtensionValue.cs
+++ b/csharp/src/Google.Protobuf/ExtensionValue.cs
@@ -213,7 +213,23 @@ namespace Google.Protobuf
 
         public bool IsInitialized()
         {
-            return field.All(m => m is IMessage && (m as IMessage).IsInitialized());
+            for (int i = 0; i < field.Count; i++)
+            {
+                var element = field[i];
+                if (element is IMessage)
+                {
+                    if (!(element as IMessage).IsInitialized())
+                    {
+                        return false;
+                    }
+                }
+                else
+                {
+                    break;
+                }
+            }
+
+            return true;
         }
     }
 }