如何根据绑定值将Avalonia XAML TextBlock设置为粗体？

using Avalonia.Data.Converters;
using Avalonia.Media;

public class FontWeightConverter : IBindingValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        bool isBold = (bool)value;
        return isBold ? FontWeight.Bold : FontWeight.Normal;
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

<Window xmlns="https://github.com/avaloniaui"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:converters="clr-namespace:YourNamespace.Converters">
    <Window.Resources>
        <converters:FontWeightConverter x:Key="FontWeightConverter" />
    </Window.Resources>
    <Grid>
        <TextBlock Text="Hello, World!">
            <TextBlock.FontWeight>
                <Binding Path="IsBold" Converter="{StaticResource FontWeightConverter}" />
            </TextBlock.FontWeight>
        </TextBlock>
    </Grid>
</Window>