如何在绑定了字符串列表的TextBlock中正确显示文本

<Window x:Class="WpfApp.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:WpfApp"
        Title="MainWindow" Height="450" Width="800">
    <Window.Resources>
        <local:StringListToStringConverter x:Key="StringListToStringConverter" />
    </Window.Resources>
    <Grid>
        <TextBlock Text="{Binding MyStringList, Converter={StaticResource StringListToStringConverter}}" />
    </Grid>
</Window>

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Windows.Data;

namespace WpfApp
{
    public class StringListToStringConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value is IEnumerable<string> stringList)
            {
                return string.Join(", ", stringList);
            }
            return string.Empty;
        }

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