test.cs

using Markdig;

namespace TXTextControl {
	public static class Markdown {
		public static byte[] Convert(string markdown, BinaryStreamType binaryStreamType) {

         var pipeline = new MarkdownPipelineBuilder().UseAdvancedExtensions().Build();
         var htmlString = Markdig.Markdown.ToHtml(markdown, pipeline);

         using (ServerTextControl tx = new ServerTextControl()) {
            tx.Create();

            tx.Load(htmlString, StringStreamType.HTMLFormat);

            byte[] results;
            tx.Save(out results, binaryStreamType);

            return results;
         }
      }
   }
}