From 1f87b725bc7b84992b2abd17e666446dc0f74f23 Mon Sep 17 00:00:00 2001
From: Shreyas Zare <shreyas@technitium.com>
Date: Sun, 5 May 2019 18:19:14 +0530
Subject: [PATCH] minor changes

---
 DnsServerCore/DnsServer.cs | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/DnsServerCore/DnsServer.cs b/DnsServerCore/DnsServer.cs
index 450b14c2..dc85bc10 100644
--- a/DnsServerCore/DnsServer.cs
+++ b/DnsServerCore/DnsServer.cs
@@ -57,12 +57,12 @@ namespace DnsServerCore
 
         IPAddress[] _localIPs;
 
-        List<Socket> _udpListeners = new List<Socket>();
-        List<Socket> _tcpListeners = new List<Socket>();
-        List<Socket> _httpListeners = new List<Socket>();
-        List<Socket> _tlsListeners = new List<Socket>();
-        List<Socket> _httpsListeners = new List<Socket>();
-        List<Thread> _listenerThreads = new List<Thread>();
+        readonly List<Socket> _udpListeners = new List<Socket>();
+        readonly List<Socket> _tcpListeners = new List<Socket>();
+        readonly List<Socket> _httpListeners = new List<Socket>();
+        readonly List<Socket> _tlsListeners = new List<Socket>();
+        readonly List<Socket> _httpsListeners = new List<Socket>();
+        readonly List<Thread> _listenerThreads = new List<Thread>();
 
         bool _enableDnsOverHttp = false;
         bool _enableDnsOverTls = false;