use of ApplicationSettingsBase

Hi,

I'm trying a class with ApplicationSettingsBase, but id does not save anything nor load. Can someone advice what is wrong here ? After the 'save' I expect somewhere to find a config file, but no nothing find...

Code:

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    partial class Form1: Form
    {
        MySettings cfg = new MySettings();

        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            listBox1.Items.Add(cfg.MyValue.ToString());
            listBox1.Items.Add(cfg.MyFormColor.ToString());
            cfg.MyValue = 567;
            cfg.MyFormColor = System.Drawing.Color.Bisque;
        }

        private void button2_Click(object sender, EventArgs e)
        {
            //cfg.Upgrade();
            cfg.Save();
        }
    }

    public class MySettings: ApplicationSettingsBase
    {
        //[UserScopedSetting]
        [ApplicationScopedSetting]
        [DefaultSettingValue("123")]
        public int MyValue
        {
            get { return (int)this["MyValue"]; }
            set { this["MyValue"] = value; }
        }

        //[UserScopedSetting]
        [ApplicationScopedSetting]
        [DefaultSettingValue("Blue")]
        public Color MyFormColor
        {
            get { return (Color)this["MyFormColor"]; }
            set { this["MyFormColor"] = value; }
        }
    }

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