From 8a9820d02c9844b07bb37f37e4144988c5a88ff5 Mon Sep 17 00:00:00 2001
From: sta <sta.blockhead@gmail.com>
Date: Sun, 14 Jan 2018 17:56:07 +0900
Subject: [PATCH] [Modify] Polish it

---
 websocket-sharp/Net/HttpListenerRequest.cs | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/websocket-sharp/Net/HttpListenerRequest.cs b/websocket-sharp/Net/HttpListenerRequest.cs
index d99e3f7b..4079da7c 100644
--- a/websocket-sharp/Net/HttpListenerRequest.cs
+++ b/websocket-sharp/Net/HttpListenerRequest.cs
@@ -371,8 +371,13 @@ namespace WebSocketSharp.Net
     /// </value>
     public NameValueCollection QueryString {
       get {
-        return _queryString ??
-               (_queryString = HttpUtility.InternalParseQueryString (_url.Query, Encoding.UTF8));
+        if (_queryString == null) {
+          _queryString = HttpUtility.InternalParseQueryString (
+                           _url.Query, Encoding.UTF8
+                         );
+        }
+
+        return _queryString;
       }
     }