From 18747d5345b8a073a24866c38830b5312b494966 Mon Sep 17 00:00:00 2001
From: sta <sta.blockhead@gmail.com>
Date: Sat, 22 Sep 2018 20:40:52 +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 0d207d77..9372d683 100644
--- a/websocket-sharp/Net/HttpUtility.cs
+++ b/websocket-sharp/Net/HttpUtility.cs
@@ -1165,7 +1165,7 @@ namespace WebSocketSharp.Net
     public static string UrlEncode (byte[] bytes)
     {
       if (bytes == null)
-        return null;
+        throw new ArgumentNullException ("bytes");
 
       var len = bytes.Length;
       return len > 0