From 3208045baab5ecb37f0a9aee5a96eb606a00f10b Mon Sep 17 00:00:00 2001
From: Christian Kratky <christian.kratky@googlemail.com>
Date: Fri, 30 Oct 2020 20:42:52 +0100
Subject: [PATCH] Extend application message builder.

---
 Source/MQTTnet/MqttApplicationMessageBuilder.cs | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/Source/MQTTnet/MqttApplicationMessageBuilder.cs b/Source/MQTTnet/MqttApplicationMessageBuilder.cs
index c265e4d1..bc2d9b86 100644
--- a/Source/MQTTnet/MqttApplicationMessageBuilder.cs
+++ b/Source/MQTTnet/MqttApplicationMessageBuilder.cs
@@ -1,4 +1,5 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using System.Text;
@@ -103,6 +104,16 @@ namespace MQTTnet
             return this;
         }
 
+        public MqttApplicationMessageBuilder WithQualityOfServiceLevel(int qualityOfServiceLevel)
+        {
+            if (qualityOfServiceLevel < 0 || qualityOfServiceLevel > 2)
+            {
+                throw new ArgumentOutOfRangeException(nameof(qualityOfServiceLevel));
+            }
+
+            return WithQualityOfServiceLevel((MqttQualityOfServiceLevel)qualityOfServiceLevel);
+        }
+
         public MqttApplicationMessageBuilder WithRetainFlag(bool value = true)
         {
             _retain = value;