如何在windows phone应用程序中获得richtextbox文本到textblock

如何在windows phone应用程序中使用c#将richtextbox文本转换为textblock
我为windows phone应用程序做了这个

  private void OnMessageReceived(string message)
    {
        var paragraph = new Paragraph();
        var runs = new List<Inline>();
        foreach (var word in message.Split(' '))
        {
            Uri uri;
            if (Uri.TryCreate(word, UriKind.Absolute, out uri) ||
               (word.StartsWith("www.") || word.EndsWith(".com") || word.Contains("@") && Uri.TryCreate("http://" + word, UriKind.Absolute, out uri)))
            {
                var link = new Hyperlink();
                link.Inlines.Add(new Run() { Text = word });
                link.Click += (sender, e) =>
                {
                    var hyperLink = (sender as Hyperlink);
                    new WebBrowserTask() { Uri = uri }.Show();
                };
                runs.Add(link);
            }
            else
            {
                runs.Add(new Run() { Text = word });
            }
            runs.Add(new Run() { Text = " " });
        }
        foreach (var run in runs)
            paragraph.Inlines.Add(run);
        txtDisplayText.Blocks.Add(paragraph);
    }

"txtDiplayText"是一个RichTextBox我想要的RichTextBox数据TextBlock

enter code here

        RichTextBox rtb = new RichTextBox();
        rtb.TextWrapping = TextWrapping.Wrap;
        rtb.FontSize = 12;
        rtb.FontFamily = new FontFamily("Arial");
        rtb.Width = this.Width;
        Run run = new Run();
        run.Text = "Hello World.Hello World.Hello World.Hello World.Hello World.";
        Paragraph para = new Paragraph();
        para.Inlines.Add(run);
        rtb.Blocks.Add(para);