Remove batch sending of messages to prevent message reordering and several required awaits.

Source/MQTTnet/ApplicationMessagePublisherExtensions.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 using System.Threading.Tasks;
 using MQTTnet.Protocol;
 
@@ -6,19 +7,33 @@ namespace MQTTnet
 {
     public static class ApplicationMessagePublisherExtensions
     {
-        public static Task PublishAsync(this IApplicationMessagePublisher publisher, params MqttApplicationMessage[] applicationMessages)
+        public static async Task PublishAsync(this IApplicationMessagePublisher publisher, IEnumerable<MqttApplicationMessage> applicationMessages)
         {
             if (publisher == null) throw new ArgumentNullException(nameof(publisher));
             if (applicationMessages == null) throw new ArgumentNullException(nameof(applicationMessages));
 
-            return publisher.PublishAsync(applicationMessages);
+            foreach (var applicationMessage in applicationMessages)
+            {
+                await publisher.PublishAsync(applicationMessage);
+            }
+        }
+
+        public static async Task PublishAsync(this IApplicationMessagePublisher publisher, params MqttApplicationMessage[] applicationMessages)
+        {
+            if (publisher == null) throw new ArgumentNullException(nameof(publisher));
+            if (applicationMessages == null) throw new ArgumentNullException(nameof(applicationMessages));
+
+            foreach (var applicationMessage in applicationMessages)
+            {
+                await publisher.PublishAsync(applicationMessage);
+            }
         }
 
         public static Task PublishAsync(this IApplicationMessagePublisher publisher, string topic)
         {
             if (publisher == null) throw new ArgumentNullException(nameof(publisher));
             if (topic == null) throw new ArgumentNullException(nameof(topic));
-            
+
             return publisher.PublishAsync(builder => builder
                 .WithTopic(topic)
             );