WPF中多个RadioButton绑定到一个属性

<RadioButton IsChecked="{Binding Option, Converter={cvt:EnumToBooleanConverter},ConverterParameter={x:Static enum:RadionButtonOptions.One}}" Content="One" DockPanel.Dock="Top"/>
<RadioButton IsChecked="{Binding Option, Converter={cvt:EnumToBooleanConverter},ConverterParameter={x:Static enum:RadionButtonOptions.Two}}" Content="Two" DockPanel.Dock="Top"/>
<RadioButton IsChecked="{Binding Option, Converter={cvt:EnumToBooleanConverter},ConverterParameter={x:Static enum:RadionButtonOptions.Three}}" Content="Two" DockPanel.Dock="Top"/>

public const string OptionPropertyName = "Option";
private RadionButtonOptions _option;
public RadionButtonOptions Option
{
    get
    {
        return _option;
    }

    set
    {
        if (_option == value)
            return;

        _option = value;
        RaisePropertyChanged(OptionPropertyName);
    }
}

[MarkupExtensionReturnType(typeof(EnumToBooleanConverter))]
[ValueConversion(typeof(Enum), typeof(bool))]
public class EnumToBooleanConverter
    : MarkupExtension, IValueConverter
{
    private static EnumToBooleanConverter converter = null;

    public override object ProvideValue(IServiceProvider serviceProvider)
    {
        if (null == converter)
        {
            converter = new EnumToBooleanConverter();
        }

        return converter;
    }

    public object Convert(object value, Type targetType, object parameter,
        System.Globalization.CultureInfo culture)
    {
        return value.Equals(parameter);
    }

    public object ConvertBack(object value, Type targetType,
        object parameter, System.Globalization.CultureInfo culture)
    {
        return value.Equals(true) ? parameter : Binding.DoNothing;
    }
}

public enum RadionButtonOptions
{
    One,
    Two,
    Three,
}

return Binding.DoNothing;