using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Configuration;

namespace settingstest
{
  class Program
  {
    static void Main(string[] args)
    {
      MySettings s = new MySettings();

      Console.WriteLine(s.StringValue1);

      showItems("before", s);

      int numItems = s.Items.Count;

      s.Items.Add(string.Format("item{0}", numItems));

      s.StringValue1 = "init";

      s.Save();

      showItems("after", s);
    }

    private static void showItems(string title, MySettings s)
    {
      Console.WriteLine(title);
      foreach (string str in s.Items)
      {
        Console.WriteLine("Item: {0}", str);
      }
    }
  }

  class MySettings : ApplicationSettingsBase
  {
    public MySettings()
      : base()
    {
      if (Items == null)
        Items = new List<string>();
    }

    [UserScopedSetting()]
    public string StringValue1 { get; set; }

    [UserScopedSetting()]
    [SettingsSerializeAs(SettingsSerializeAs.Xml)]
    public List<string> Items
    {
      get { return (List<string>)this["Items"]; }
      set { this["Items"] = value; }
    }
  }
}