From a42611e27d7439824d54fcb544b4651b49e23c23 Mon Sep 17 00:00:00 2001
From: sta <sta.blockhead@gmail.com>
Date: Mon, 24 Sep 2018 21:10:36 +0900
Subject: [PATCH] [Modify] Throw exception

---
 websocket-sharp/Net/HttpUtility.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/websocket-sharp/Net/HttpUtility.cs b/websocket-sharp/Net/HttpUtility.cs
index 9c408fa5..b853eece 100644
--- a/websocket-sharp/Net/HttpUtility.cs
+++ b/websocket-sharp/Net/HttpUtility.cs
@@ -1229,7 +1229,7 @@ namespace WebSocketSharp.Net
     public static byte[] UrlEncodeToBytes (byte[] bytes)
     {
       if (bytes == null)
-        return null;
+        throw new ArgumentNullException ("bytes");
 
       var len = bytes.Length;
       return len > 0