test.cs

private List<SmartFormField> GetFormFields(byte[] data) {
  using (TXTextControl.ServerTextControl tx = new TXTextControl.ServerTextControl()) {
    tx.Create();
    tx.Load(data, BinaryStreamType.InternalUnicodeFormat);

    List<SmartFormField> smartFormFields = new List<SmartFormField>();

    foreach (FormField field in tx.FormFields) {

      switch (field.GetType().Name) {
        case "TextFormField":
          smartFormFields.Add(new SmartTextFormField() { 
            Name = field.Name,
            Text = field.Text
          });
          break;
        case "CheckFormField":
          smartFormFields.Add(new SmartCheckboxField() {
            Name = field.Name,
            Text = field.Text,
            Checked = ((CheckFormField)field).Checked
          });
          break;
        case "SelectionFormField":
          smartFormFields.Add(new SmartDropdownField() {
            Name = field.Name,
            Text = field.Text,
            Items = ((SelectionFormField)field).Items
          });
          break;
        case "DateFormField":

          SmartDateField smartDateField = new SmartDateField() {
            Name = field.Name,
            Text = field.Text,
            Date = ""
          };

          if (((DateFormField)field).Date != null)
              smartDateField.Date = ((DateFormField)field).Date.Value.ToString("yyyy-MM-dd");

          smartFormFields.Add(smartDateField);
          break;
      }

    }

    return smartFormFields;
  }
}