From c16b0a8b2ea630839ac0f139fa743e4adf418ddd Mon Sep 17 00:00:00 2001
From: sta <sta.blockhead@gmail.com>
Date: Sat, 22 May 2021 21:38:49 +0900
Subject: [PATCH] [Modify] Polish it

---
 websocket-sharp/Net/HttpListenerAsyncResult.cs | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/websocket-sharp/Net/HttpListenerAsyncResult.cs b/websocket-sharp/Net/HttpListenerAsyncResult.cs
index 3b759560..37d43615 100644
--- a/websocket-sharp/Net/HttpListenerAsyncResult.cs
+++ b/websocket-sharp/Net/HttpListenerAsyncResult.cs
@@ -112,8 +112,12 @@ namespace WebSocketSharp.Net
 
     public WaitHandle AsyncWaitHandle {
       get {
-        lock (_sync)
-          return _waitHandle ?? (_waitHandle = new ManualResetEvent (_completed));
+        lock (_sync) {
+          if (_waitHandle == null)
+            _waitHandle = new ManualResetEvent (_completed);
+
+          return _waitHandle;
+        }
       }
     }