v4.0.0 (#1357)

Source/MQTTnet/Server/Events/ClientDisconnectedEventArgs.cs

@@ -0,0 +1,21 @@
+// 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 ClientDisconnectedEventArgs : EventArgs
+    {
+        /// <summary>
+        /// Gets the client identifier.
+        /// Hint: This identifier needs to be unique over all used clients / devices on the broker to avoid connection issues.
+        /// </summary>
+        public string ClientId { get; internal set; }
+
+        public MqttClientDisconnectType DisconnectType { get; internal set; }
+
+        public string Endpoint { get; internal set; }
+    }
+}