Bind StringCollection to a ListBox

[Speedo]

Can anyone give me an example of how to set this up when the StringCollection is a class member? I've been able to get it to work with a StringCollection that's in project settings, but can quite get it right in the case where it's a member of the class.

Edit: Apparently StringCollection doesn't support two way binding, so I've switch to a ObservableCollection<string>.

Just to be clear, I need something like this:

CS

public partial class MyWindow : Window
{
  private ObservableCollection<string> mystrings;

  ...
}

XAML

<Window x:Class="MyWindow"
...

  <ListBox ItemsSource="{Binding ??? what here ???, Mode="TwoWay"}"/>
</Window>

[Speedo]

Apparently members have to be set up as properties before you can bind to them. I feel dumb now.

[Borr]

It should be not just property, it should be DEPENDENCY property.

In Window1.xaml.cs:

public static readonly DependencyProperty MyStringsProperty = DependencyProperty.Register("MyStrings", typeof(ObservableCollection<string>), typeof(Window1), new FrameworkPropertyMetadata(null));
public ObservableCollection<string> MyStrings
{
get
{
ObservableCollection<string> p = (ObservableCollection<string>)GetValue(MyStringsProperty);
return p;
}
set
{
SetValue(MyStringsProperty, value);
}
}

In Window1.XAML:

<Window ... x:Name="Wnd1" >
...
<ListBox ... ItemsSource="{Binding ElementName=Wnd1, Path=MyStrings, Mode=TwoWay}"/>
...
</Window>