You should be using a MVVM pattern, where the DataContext of your form is some class that contains the AvailableFonts and SelectedFont properties.

public ObservableCollection AvailableFonts {get;set;}

public FontInformation SelectedFont {get;set { …raise property change…}}

Hope that helps.

Thanks again!

From my point of view the default behavior is the one expected. The reason why I believe this, is because, as in Windows Forms applications, if you have a control on your form and you set the SelectedItem property, without prior setting its DataSource property, it will display no data (because the item cannot be found in the underlying data).
Also, if you write custom controls in WinForms/WPF you will usually create member variables to store the information for child controls, usually to prevent populating them in the Design Mode or to correctly serialize the custom properties defined.

Criss