From 903dd2fc36931a2d1ea7284015985a813a696ebf Mon Sep 17 00:00:00 2001
From: sta <sta.blockhead@gmail.com>
Date: Mon, 23 Oct 2017 16:19:32 +0900
Subject: [PATCH] [Modify] Polish it

---
 websocket-sharp/WebSocket.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/websocket-sharp/WebSocket.cs b/websocket-sharp/WebSocket.cs
index d71b01a4..eb086310 100644
--- a/websocket-sharp/WebSocket.cs
+++ b/websocket-sharp/WebSocket.cs
@@ -445,7 +445,7 @@ namespace WebSocketSharp
         string msg = null;
 
         if (!_client) {
-          msg = "The set operation cannot be used by servers.";
+          msg = "This instance is not a client.";
           throw new InvalidOperationException (msg);
         }