Merge proces, enable signing of the assembly.

Frameworks/MQTTnet.NetStandard/Packets/MqttUnsubscribe.cs

@@ -0,0 +1,17 @@
+using System.Collections.Generic;
+
+namespace MQTTnet.Packets
+{
+    public sealed class MqttUnsubscribePacket : MqttBasePacket, IMqttPacketWithIdentifier
+    {
+        public ushort PacketIdentifier { get; set; }
+
+        public IList<string> TopicFilters { get; set; } = new List<string>();
+
+        public override string ToString()
+        {
+            var topicFiltersText = string.Join(",", TopicFilters);
+            return "Subscribe: [PacketIdentifier=" + PacketIdentifier + "] [TopicFilters=" + topicFiltersText + "]";
+        }
+    }
+}