如何在xamarin中解决单选按钮

// ViewModel
public class MyViewModel : INotifyPropertyChanged
{
    private bool _isSelectedOption1;
    private bool _isSelectedOption2;

    public bool IsSelectedOption1
    {
        get { return _isSelectedOption1; }
        set
        {
            if (_isSelectedOption1 != value)
            {
                _isSelectedOption1 = value;
                OnPropertyChanged(nameof(IsSelectedOption1));
            }
        }
    }

    public bool IsSelectedOption2
    {
        get { return _isSelectedOption2; }
        set
        {
            if (_isSelectedOption2 != value)
            {
                _isSelectedOption2 = value;
                OnPropertyChanged(nameof(IsSelectedOption2));
            }
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;

    protected virtual void OnPropertyChanged(string propertyName)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}

// View
public partial class MainPage : ContentPage
{
    private MyViewModel _viewModel;

    public MainPage()
    {
        InitializeComponent();
        _viewModel = new MyViewModel();
        BindingContext = _viewModel;
    }

    private void Option1RadioButton_CheckedChanged(object sender, CheckedChangedEventArgs e)
    {
        if (e.Value)
        {
            _viewModel.IsSelectedOption1 = true;
            _viewModel.IsSelectedOption2 = false;
        }
    }

    private void Option2RadioButton_CheckedChanged(object sender, CheckedChangedEventArgs e)
    {
        if (e.Value)
        {
            _viewModel.IsSelectedOption1 = false;
            _viewModel.IsSelectedOption2 = true;
        }
    }
}