CommandControl.xaml.cs

int index = 0;

foreach (Match match in matches)
{
    paragraph.Inlines.Add(new Run(System.Net.WebUtility.HtmlDecode(content.Substring(index, match.Index - index))));

    var hyperLink = new Hyperlink(new Run(match.Groups["label"].Value));

    var command = match.Groups["command"].Value;

    hyperLink.Command = new DmlCommand(() => _ = ExecuteCommand(command));

    paragraph.Inlines.Add(hyperLink);

    index = match.Index + match.Length;
}

if (index < content.Length)
{
    paragraph.Inlines.Add(new Run(System.Net.WebUtility.HtmlDecode(content.Substring(index))));
}