public void ListBoxSelectedItemTest()
{
var input = new ListBox();
input.Items.Add("Foo");
input.Items.Add("Bar");
input.Items.Add("Baz");
var output = input.WhenAnyValue(x => x.SelectedItem).CreateCollection();
Assert.Equal(1, output.Count);
input.SelectedIndex = 1;
Assert.Equal(2, output.Count);
input.SelectedIndex = 2;
Assert.Equal(3, output.Count);
}
