From f0dd2a03e855795176d9d4d8a82dccb5b64cda69 Mon Sep 17 00:00:00 2001
From: sta <sta.blockhead@gmail.com>
Date: Wed, 25 Nov 2020 19:37:44 +0900
Subject: [PATCH] [Modify] Add a null check

---
 websocket-sharp/Net/ClientSslConfiguration.cs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/websocket-sharp/Net/ClientSslConfiguration.cs b/websocket-sharp/Net/ClientSslConfiguration.cs
index 0cae24a6..baccc0cf 100644
--- a/websocket-sharp/Net/ClientSslConfiguration.cs
+++ b/websocket-sharp/Net/ClientSslConfiguration.cs
@@ -76,7 +76,11 @@ namespace WebSocketSharp.Net
     /// </param>
     public ClientSslConfiguration (string targetHost)
     {
+      if (targetHost == null)
+        throw new ArgumentNullException ("targetHost");
+
       _targetHost = targetHost;
+
       _enabledSslProtocols = SslProtocols.None;
     }