MVVM: Binding radio buttons to a view model?

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If you start with Jason’s suggestion then the problem becomes a single bound selection from a list which translates very nicely to a ListBox. At that point it’s trivial to apply styling to a ListBox control so that it shows up as a RadioButton list.

<ListBox ItemsSource="{Binding ...}" SelectedItem="{Binding ...}">
    <ListBox.ItemContainerStyle>
        <Style TargetType="{x:Type ListBoxItem}">
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type ListBoxItem}">
                        <RadioButton Content="{TemplateBinding Content}"
                                     IsChecked="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=IsSelected}"/>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </ListBox.ItemContainerStyle>
</ListBox>

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