From a278b6189b592b15b45e5a964d696d196ee7a84c Mon Sep 17 00:00:00 2001
From: Christian Kratky <christian.kratky@googlemail.com>
Date: Wed, 1 May 2019 19:41:34 +0200
Subject: [PATCH] Refactor empty payload detection for retained messages.

---
 Source/MQTTnet/Server/MqttRetainedMessagesManager.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Source/MQTTnet/Server/MqttRetainedMessagesManager.cs b/Source/MQTTnet/Server/MqttRetainedMessagesManager.cs
index 8151fc00..2e6af16a 100644
--- a/Source/MQTTnet/Server/MqttRetainedMessagesManager.cs
+++ b/Source/MQTTnet/Server/MqttRetainedMessagesManager.cs
@@ -61,7 +61,7 @@ namespace MQTTnet.Server
                 using (await _messagesLock.WaitAsync().ConfigureAwait(false))
                 {
                     var saveIsRequired = false;
-                    var hasPayload = applicationMessage.Payload?.Any() == true;
+                    var hasPayload = applicationMessage.Payload != null && applicationMessage.Payload.Length > 0;
 
                     if (!hasPayload)
                     {