From 00a7de1508b163bf7e27baadf81532b44d1b6380 Mon Sep 17 00:00:00 2001
From: sta <sta.blockhead@gmail.com>
Date: Sat, 13 Oct 2018 20:33:31 +0900
Subject: [PATCH] [Modify] Throw exception

---
 websocket-sharp/Net/HttpUtility.cs | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/websocket-sharp/Net/HttpUtility.cs b/websocket-sharp/Net/HttpUtility.cs
index 53919a8d..1887a07d 100644
--- a/websocket-sharp/Net/HttpUtility.cs
+++ b/websocket-sharp/Net/HttpUtility.cs
@@ -1161,8 +1161,11 @@ namespace WebSocketSharp.Net
 
     public static byte[] UrlDecodeToBytes (byte[] bytes)
     {
-      int len;
-      return bytes != null && (len = bytes.Length) > 0
+      if (bytes == null)
+        throw new ArgumentNullException ("bytes");
+
+      var len = bytes.Length;
+      return len > 0
              ? InternalUrlDecodeToBytes (bytes, 0, len)
              : bytes;
     }