From 0bb7e462db391d9324259abe6d2c2670a7e6ad60 Mon Sep 17 00:00:00 2001
From: sta <sta.blockhead@gmail.com>
Date: Wed, 4 Mar 2020 21:28:31 +0900
Subject: [PATCH] [Modify] Polish it

---
 websocket-sharp/Net/WebHeaderCollection.cs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/websocket-sharp/Net/WebHeaderCollection.cs b/websocket-sharp/Net/WebHeaderCollection.cs
index a9993a5f..66bd7045 100644
--- a/websocket-sharp/Net/WebHeaderCollection.cs
+++ b/websocket-sharp/Net/WebHeaderCollection.cs
@@ -797,6 +797,9 @@ namespace WebSocketSharp.Net
 
       name = name.Trim ();
 
+      if (name.Length == 0)
+        throw new ArgumentException ("A string of spaces.", "name");
+
       if (!IsHeaderName (name)) {
         var msg = "It contains an invalid character.";