From cce2a5ee8c6690784a5751faca3447aeebdd2a48 Mon Sep 17 00:00:00 2001
From: sta <sta.blockhead@gmail.com>
Date: Thu, 10 Oct 2019 20:59:08 +0900
Subject: [PATCH] [Modify] Polish it

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

diff --git a/websocket-sharp/Net/HttpListenerResponse.cs b/websocket-sharp/Net/HttpListenerResponse.cs
index 92c0a797..73a1fd46 100644
--- a/websocket-sharp/Net/HttpListenerResponse.cs
+++ b/websocket-sharp/Net/HttpListenerResponse.cs
@@ -272,8 +272,13 @@ namespace WebSocketSharp.Net
     /// </exception>
     public Stream OutputStream {
       get {
-        checkDisposed ();
-        return _outputStream ?? (_outputStream = _context.Connection.GetResponseStream ());
+        if (_disposed)
+          throw new ObjectDisposedException (GetType ().ToString ());
+
+        if (_outputStream == null)
+          _outputStream = _context.Connection.GetResponseStream ();
+
+        return _outputStream;
       }
     }