配置文件功能完善

System.Application.SteamTools.Client.Desktop/Serialization/ValueChangedEventArgs.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace System.Application.Serialization
+{
+	public class ValueChangedEventArgs<T> : EventArgs
+	{
+		public T OldValue { get; }
+		public T NewValue { get; }
+
+		public ValueChangedEventArgs(T oldValue, T newValue)
+		{
+			this.OldValue = oldValue;
+			this.NewValue = newValue;
+		}
+	}
+}