在WPF中合并两个ObservableCollection集合

    void testCompositeCollection()
    {
        var cmpc = new CompositeCollection();

        var numbers = new ObservableCollection<int>();
        var lines = new ObservableCollection<string>();


        cmpc.Add(new CollectionContainer() { Collection = numbers });
        cmpc.Add(new CollectionContainer() { Collection = lines });

        listBox.ItemsSource = cmpc;

        foo(numbers);
        foo(lines);
    }

    async void foo(ObservableCollection<string> lines)
    {
        for (int i = 0; i < 10; i++)
        {
            await Task.Delay(800);
            lines.Add("Line " + 2 * i);
        }
    }

    async void foo(ObservableCollection<int> numbers)
    {
        for (int i = 0; i < 10; i++)
        {
            await Task.Delay(1000);
            numbers.Add(i);
        }
    }