test.cs

public static string MergeWorkorder(Workorder workorder) {

  using (TXTextControl.ServerTextControl tx = new TXTextControl.ServerTextControl()) {

    tx.Create();

    // load the work order template
    tx.Load(HttpContext.Current.Server.MapPath(
      "~/App_Data/workorder.tx"),
      TXTextControl.StreamType.InternalUnicodeFormat);

    MailMerge mm = new MailMerge() {
      TextComponent = tx
    };

    // merge the data into the template
    mm.MergeObject(workorder);

    // generate a unique filename and save the work order
    var sFileName = Helpers.GenerateUID(5);
    tx.Save(HttpContext.Current.Server.MapPath("~/App_Data/" + sFileName + ".tx"),
      TXTextControl.StreamType.InternalUnicodeFormat);

    return sFileName;
  }
}