From 3c1b3f6ced9deb7809c7c160c16d06f2930c8abd Mon Sep 17 00:00:00 2001
From: sta <sta.blockhead@gmail.com>
Date: Thu, 16 Jul 2020 19:46:30 +0900
Subject: [PATCH] [Modify] Replace it

---
 websocket-sharp/Net/WebHeaderCollection.cs | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/websocket-sharp/Net/WebHeaderCollection.cs b/websocket-sharp/Net/WebHeaderCollection.cs
index f641efee..550422e2 100644
--- a/websocket-sharp/Net/WebHeaderCollection.cs
+++ b/websocket-sharp/Net/WebHeaderCollection.cs
@@ -953,7 +953,16 @@ namespace WebSocketSharp.Net
                 ? header.Substring (idx + 1)
                 : String.Empty;
 
-      InternalSet (name, val, response);
+      name = checkName (name, "header");
+      val = checkValue (val, "header");
+
+      if (isMultiValue (name, response)) {
+        base.Add (name, val);
+
+        return;
+      }
+
+      base.Set (name, val);
     }
 
     internal void InternalSet (string name, string value, bool response)