有没有办法在WPF ListBox项目运行时更改特定单词/字符串的颜色？

public class StringColorConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        string inputString = value as string;
        string targetWord = parameter as string;

        if (inputString != null && targetWord != null)
        {
            if (inputString.Contains(targetWord))
            {
                string[] words = inputString.Split(' ');
                StringBuilder result = new StringBuilder();

                foreach (string word in words)
                {
                    if (word.Equals(targetWord))
                    {
                        result.Append("<TextBlock Foreground='Red'>" + word + "</TextBlock>");
                    }
                    else
                    {
                        result.Append(word);
                    }

                    result.Append(" ");
                }

                return XamlReader.Parse(result.ToString());
            }
        }

        return inputString;
    }

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

<ListBox ItemsSource="{Binding YourData}">
    <ListBox.ItemTemplate>
        <DataTemplate>
            <ContentPresenter Content="{Binding Converter={StaticResource StringColorConverter}, ConverterParameter='特定单词'}"/>
        </DataTemplate>
    </ListBox.ItemTemplate>
</ListBox>

public partial class App : Application
{
    protected override void OnStartup(StartupEventArgs e)
    {
        base.OnStartup(e);

        // 注册Converter
        Resources.Add("StringColorConverter", new StringColorConverter());
    }
}