refactor: rearrange and add solution for 4-series

src/PepperDash.Essentials.Core/Devices/VolumeDeviceChangeEventArgs.cs

@@ -0,0 +1,36 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using Crestron.SimplSharp;
+
+using PepperDash.Core;
+using PepperDash.Essentials.Core;
+
+namespace PepperDash.Essentials.Core
+{
+	/// <summary>
+	/// 
+	/// </summary>
+	public class VolumeDeviceChangeEventArgs : EventArgs
+	{
+		public IBasicVolumeControls OldDev { get; private set; }
+		public IBasicVolumeControls NewDev { get; private set; }
+		public ChangeType Type { get; private set; }
+
+		public VolumeDeviceChangeEventArgs(IBasicVolumeControls oldDev, IBasicVolumeControls newDev, ChangeType type)
+		{
+			OldDev = oldDev;
+			NewDev = newDev;
+			Type = type;
+		}
+	}
+
+	/// <summary>
+	/// 
+	/// </summary>
+	public enum ChangeType
+	{
+		WillChange, DidChange
+	}
+}