diff --git a/Lib.Audio/Channel.cs b/Lib.Audio/Channel.cs
index 0b62c24..f33af90 100644
--- a/Lib.Audio/Channel.cs
+++ b/Lib.Audio/Channel.cs
@@ -2,6 +2,7 @@
 // Created: 2021-04-07
 // Copyright(c) 2021 SimonG. All Rights Reserved.
 
+using System;
 using System.Collections.Generic;
 using Lib.Audio.Controls.Buttons.Factories;
 using Lib.Audio.Controls.Buttons.Interfaces;
@@ -18,7 +19,6 @@ namespace Lib.Audio
     public class Channel : IChannel
     {
         private readonly int _channelNumber;
-
         private IMidiMessage? _acknowledgeMessage;
 
         public Channel(XmlChannel xmlChannel,