From 5a12bbb2315b636029c91c6a0cf93db82add07f9 Mon Sep 17 00:00:00 2001
From: Shreyas Zare <shreyas@technitium.com>
Date: Sat, 15 Jun 2024 19:30:37 +0530
Subject: [PATCH] AuthZoneManager: fixed issue in SaveZoneFileInternal() to
 prevent generating empty zone file.

---
 DnsServerCore/Dns/ZoneManagers/AuthZoneManager.cs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/DnsServerCore/Dns/ZoneManagers/AuthZoneManager.cs b/DnsServerCore/Dns/ZoneManagers/AuthZoneManager.cs
index c4ce2920..dfa5acf2 100644
--- a/DnsServerCore/Dns/ZoneManagers/AuthZoneManager.cs
+++ b/DnsServerCore/Dns/ZoneManagers/AuthZoneManager.cs
@@ -799,6 +799,9 @@ namespace DnsServerCore.Dns.ZoneManagers
                 //serialize zone
                 WriteZoneTo(zoneName, mS);
 
+                if (mS.Position == 0)
+                    return; //zone was not found
+
                 //write to zone file
                 mS.Position = 0;