Trouble saving a collection of objects in Application Settings

Question

I\'m trying to store a collection of custom objects in the Application Settings.

With some help from this related question, here is what I currently have:

Answer 1

I figured it out thanks to this question!

As suggested in that question I added this to Settings.Designer.cs:

    [global::System.Configuration.UserScopedSettingAttribute()]
    [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
    public ObservableCollection AllPeople
    {
        get
        {
            return ((ObservableCollection)(this["AllPeople"]));
        }
        set
        {
            this["AllPeople"] = value;
        }
    }

And then all I needed was the following code:

[Serializable]
public class Person
{
    public String FirstName { get; set; }
}

public MainWindow()
{
    InitializeComponent();

    // this now works!!
    if (Properties.Settings.Default.AllPeople == null)
    {
        Properties.Settings.Default.AllPeople = new ObservableCollection 
        { 
            new Person() { FirstName = "bob" },
            new Person() { FirstName = "sue" },
            new Person() { FirstName = "bill" }
        };
        Properties.Settings.Default.Save();
    }
    else
    {
        MessageBox.Show(Properties.Settings.Default.AllPeople.People.Count.ToString());
    }
}