v4.0.0 (#1357)

Source/MQTTnet/Server/InjectedMqttApplicationMessage.cs

@@ -0,0 +1,20 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+
+namespace MQTTnet.Server
+{
+    public sealed class InjectedMqttApplicationMessage
+    {
+        public InjectedMqttApplicationMessage(MqttApplicationMessage applicationMessage)
+        {
+            ApplicationMessage = applicationMessage ?? throw new ArgumentNullException(nameof(applicationMessage));
+        }
+        
+        public string SenderClientId { get; set; }
+
+        public MqttApplicationMessage ApplicationMessage { get; set; }
+    }
+}