Linking a enumeration type to the IsChecked property of a RadioButton can eliminate the need for multiple boolean bindings, especially when dealing with numerous enum types, which simplifies maintenance of boolean objects.

1. Define the enum and value converter

internal enum Gender
{
    [Description("Male")]
    Male,
    [Description("Female")]
    Female,
    [Description("Unknown")]
    Unknown
}

[ValueConversion(typeof(Gender), typeof(bool?))]
public class GenderToIsCheckedConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        if (targetType != typeof(bool?))
        {
            throw new InvalidOperationException("The target must be a bool");
        }

        if (value == null || parameter == null)
        {
            throw new ArgumentNullException();
        }

        if (!Enum.IsDefined(typeof(Gender), value))
        {
            throw new InvalidOperationException("The value must be a Gender");
        }

        if (!Enum.IsDefined(typeof(Gender), parameter))
        {
            throw new InvalidOperationException("The parameter must be a Gender");
        }

        return (Gender)value == (Gender)parameter;
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        if (targetType != typeof(Gender))
        {
            throw new InvalidOperationException("The target must be a Gender");
        }

        if (parameter == null || !Enum.IsDefined(typeof(Gender), parameter))
        {
            throw new InvalidOperationException("The parameter must be a Gender");
        }

        if (value is not bool isChecked)
        {
            throw new InvalidOperationException("The value must be a bool");
        }

        return isChecked ? (Gender)parameter : Binding.DoNothing;
    }
}

2. Define the RadioButton control and perform the binding

<Window x:Class="WpfDeveloping.Views.RadioSampleWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:valueConverters="clr-namespace:WpfDeveloping.ValueConverters"
        xmlns:models="clr-namespace:WpfDeveloping.Models"
        mc:Ignorable="d"
        Title="RadioSampleWindow"
        WindowStartupLocation="CenterScreen"
        Height="180" Width="320">
    <Window.Resources>
        <valueConverters:GenderToIsCheckedConverter x:Key="GenderConverter"/>
        <Style x:Key="MyRadioButton" TargetType="RadioButton">
            <Setter Property="Height" Value="30"/>
            <Setter Property="VerticalContentAlignment" Value="Center"/>
            <Setter Property="Margin" Value="10,0,0,0"/>
        </Style>
    </Window.Resources>
    <StackPanel Orientation="Vertical">
        <RadioButton Content="Male" Style="{StaticResource MyRadioButton}"
                     IsChecked="{Binding Gender, Converter={StaticResource GenderConverter}, ConverterParameter={x:Static models:Gender.Male}}"/>
        <RadioButton Content="Female" Style="{StaticResource MyRadioButton}"
                     IsChecked="{Binding Gender, Converter={StaticResource GenderConverter}, ConverterParameter={x:Static models:Gender.Female}}"/>
        <RadioButton Content="Unknown" Style="{StaticResource MyRadioButton}"
                     IsChecked="{Binding Gender, Converter={StaticResource GenderConverter}, ConverterParameter={x:Static models:Gender.Unknown}}"/>
    </StackPanel>
</Window>

3. Define the enum object in the ViewModel

internal class RadioSampleWindowViewModel : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged;

    public Gender Gender
    {
        get => _gender;
        set
        {
            if (_gender != value)
            {
                _gender = value;
                OnPropertyChanged();
                Debug.WriteLine($"Current gender: {value}");
            }
        }
    }

    private Gender _gender = Gender.Unknown;

    [NotifyPropertyChangedInvocator]
    protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}

4. Screenshot of the application