如何将标志枚举绑定到MVVM中的ListBox

[Flags]
public enum Options
{
    None = 0,
    A = 1,
    B = 2,
    C = 4,
    D = 8
}

private Options selectedOptions;
public Options SelectedOptions
{
    get { return selectedOptions; }
    set
    {
        if (selectedOptions != value)
        {
            selectedOptions = value;
            OnPropertyChanged(nameof(SelectedOptions));
        }
    }
}

<ListBox ItemsSource="{Binding Source={x:Static local:Options.None},
                                Converter={StaticResource EnumFlagsConverter}}"
         SelectedItems="{Binding SelectedOptions, Mode=TwoWay}">
    <ListBox.ItemTemplate>
        <DataTemplate>
            <CheckBox Content="{Binding}" IsChecked="{Binding Path=., Converter={StaticResource EnumFlagValueConverter}, ConverterParameter={x:Static local:Options.None}}"/>
        </DataTemplate>
    </ListBox.ItemTemplate>
</ListBox>

public class EnumFlagsConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        if (value is Enum enumValue)
        {
            return Enum.GetValues(enumValue.GetType()).Cast<Enum>().Where(enumItem => enumValue.HasFlag(enumItem));
        }
        return Enumerable.Empty<Enum>();
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

public class EnumFlagValueConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        if (value is Enum enumValue && parameter is Enum enumParameter)
        {
            return enumValue.HasFlag(enumParameter);
        }
        return false;
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        if (value is bool isChecked && isChecked && parameter is Enum enumParameter)
        {
            return enumParameter;
        }
        return Binding.DoNothing;
    }
}