From f05007e0f28e97ad4166b8b27c6af313127f9d67 Mon Sep 17 00:00:00 2001
From: Troy Dai <troy.dai@outlook.com>
Date: Thu, 1 Sep 2016 12:00:06 -0700
Subject: [PATCH] Fix error message in RequestContext

---
 .../RequestProcessing/RequestContext.cs                         | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Microsoft.Net.Http.Server/RequestProcessing/RequestContext.cs b/src/Microsoft.Net.Http.Server/RequestProcessing/RequestContext.cs
index 00044c2eed..0f533cd730 100644
--- a/src/Microsoft.Net.Http.Server/RequestProcessing/RequestContext.cs
+++ b/src/Microsoft.Net.Http.Server/RequestProcessing/RequestContext.cs
@@ -247,7 +247,7 @@ namespace Microsoft.Net.Http.Server
         {
             if (!IsUpgradableRequest)
             {
-                throw new InvalidOperationException("This request is cannot be upgraded.");
+                throw new InvalidOperationException("This request cannot be upgraded.");
             }
             WebSocketHelpers.ValidateOptions(subProtocol, keepAliveInterval);