From 1de945b378917baebc96eb88f2b36877515faf7c Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Fri, 19 May 2017 17:33:21 +0200
Subject: [PATCH] dont concatenate strings when status is OK

---
 src/csharp/Grpc.Core/Internal/CallError.cs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/csharp/Grpc.Core/Internal/CallError.cs b/src/csharp/Grpc.Core/Internal/CallError.cs
index 541575f5e6..a46f9b3859 100644
--- a/src/csharp/Grpc.Core/Internal/CallError.cs
+++ b/src/csharp/Grpc.Core/Internal/CallError.cs
@@ -72,7 +72,10 @@ namespace Grpc.Core.Internal
         /// </summary>
         public static void CheckOk(this CallError callError)
         {
-            GrpcPreconditions.CheckState(callError == CallError.OK, "Call error: " + callError);
+            if (callError != CallError.OK)
+            {
+                throw new InvalidOperationException("Call error: " + callError);
+            }
         }
     }
 }
-- 
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