From 7015e44ef60e91c9ff22ed39218d6a0455acb2f4 Mon Sep 17 00:00:00 2001
From: Shreyas Zare <shreyas@technitium.com>
Date: Sat, 13 Oct 2018 11:50:54 +0530
Subject: [PATCH] minor change

---
 DnsServerCore/DnsServer.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/DnsServerCore/DnsServer.cs b/DnsServerCore/DnsServer.cs
index b9c44e7f..b07a4046 100644
--- a/DnsServerCore/DnsServer.cs
+++ b/DnsServerCore/DnsServer.cs
@@ -786,7 +786,7 @@ namespace DnsServerCore
             set
             {
                 if (value == null)
-                    throw new NullReferenceException();
+                    throw new ArgumentNullException();
 
                 if (!value.IsAuthoritative)
                     throw new ArgumentException("Blocked zone must be authoritative.");