不带选择的WPF RadioButton数据绑定

public class ViewModel : INotifyPropertyChanged
{
    private bool isSelected;

    public bool IsSelected
    {
        get { return isSelected; }
        set
        {
            isSelected = value;
            OnPropertyChanged(nameof(IsSelected));
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;

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

<Window x:Class="YourNamespace.YourWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:YourNamespace"
        Title="Your Window" Height="450" Width="800">
    <Window.DataContext>
        <local:ViewModel />
    </Window.DataContext>
    
    <Grid>
        <RadioButton Content="Option 1" IsChecked="{Binding IsSelected}" />
        <RadioButton Content="Option 2" IsChecked="{Binding IsSelected}" />
        <RadioButton Content="Option 3" IsChecked="{Binding IsSelected}" />
    </Grid>
</Window>