From f7283c0043e1e75204dc41a06f035bdd5af1de4d Mon Sep 17 00:00:00 2001
From: sta <sta.blockhead@gmail.com>
Date: Thu, 21 May 2020 19:40:46 +0900
Subject: [PATCH] [Modify] Add a check if response or not

---
 websocket-sharp/Net/WebHeaderCollection.cs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/websocket-sharp/Net/WebHeaderCollection.cs b/websocket-sharp/Net/WebHeaderCollection.cs
index 716cd89e..71a5b7b8 100644
--- a/websocket-sharp/Net/WebHeaderCollection.cs
+++ b/websocket-sharp/Net/WebHeaderCollection.cs
@@ -842,7 +842,10 @@ namespace WebSocketSharp.Net
       if (_internallyUsed)
         return;
 
-      if (isRestricted (name, true)) {
+      var headerType = getHeaderType (name);
+      var res = headerType == HttpHeaderType.Response;
+
+      if (isRestricted (name, res)) {
         var msg = "This header must be modified with the appropiate property.";
 
         throw new ArgumentException (msg);