[ValueConversion(typeof(String), typeof(FlowDocument))]
    public class PlurkToDocumentConverter : IValueConverter
    {
        #region IValueConverter Members

        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            Run run = new Run((String)value);
            run.FontSize = 12;

            Paragraph paragraph = new Paragraph(run);
            paragraph.Padding = new System.Windows.Thickness(0.0);

            FlowDocument document = new FlowDocument(paragraph);

            document.PagePadding = new System.Windows.Thickness(0.0);

            return document;
        }

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

        #endregion
    }