Question

I’m developer of WP7 application.
Does anyone know the idea that how to bind data to ListBox.ItemSource in a ViewModel class ?

Answer 1

<ListBox ItemsSource={Binding ViewModelPropertyName}" />

ViewModelPropertyName should return an IList or better.
If you want to show changes to the collection, it should return an INotifyCollectionChanged, such as ObservableCollection<T>.

<ListBox ItemsSource={Binding ViewModelPropertyName}" />
    <ListBox.ItemTemplate>
        <DataTemplate>
            <TextBlock Text={Binding PropertyNameWithinObject} />
        </DataTemplate>
    </ListBox.ItemTemplate>
</ListBox>