From 1be22c8ff43ed81be02799641e4cd7dcf74587c4 Mon Sep 17 00:00:00 2001
From: David Fowler <davidfowl@gmail.com>
Date: Fri, 5 Apr 2013 19:58:26 -0700
Subject: [PATCH] Noop if AsyncResult set twice.

---
 src/Microsoft.AspNet.SignalR.Hosting.Memory/AsyncResult.cs | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/Microsoft.AspNet.SignalR.Hosting.Memory/AsyncResult.cs b/src/Microsoft.AspNet.SignalR.Hosting.Memory/AsyncResult.cs
index cff37e598e..a35a797639 100644
--- a/src/Microsoft.AspNet.SignalR.Hosting.Memory/AsyncResult.cs
+++ b/src/Microsoft.AspNet.SignalR.Hosting.Memory/AsyncResult.cs
@@ -47,9 +47,12 @@ public AsyncResult(AsyncCallback asyncCallback, Object state)
                 completedSynchronously
                     ? c_StateCompletedSynchronously
                     : c_StateCompletedAsynchronously);
+
             if (prevState != c_StatePending)
-                throw new InvalidOperationException(
-                    "You can set a result only once");
+            {
+                // Noop
+                return;
+            }
 
             // If the event exists, set it
             if (m_AsyncWaitHandle != null) m_AsyncWaitHandle.Set();