test.cs

public IActionResult Index()
{
	byte[] bDocument = null;

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

		tx.Selection.FontSize = 800;
		tx.Selection.Text = "Sample Form\r\n\r\n";

		tx.Selection.FontSize = 400;
		tx.Selection.Text = "Company name:\r\n";

		// add a text form field
		TXTextControl.TextFormField textFormField = new TXTextControl.TextFormField(1000);
		textFormField.Name = "company_name";
		textFormField.Text = "Text Control, LLC";
		tx.FormFields.Add(textFormField);

		tx.Selection.Text = "\r\n\r\nCountry:\r\n";

		// add a text form field
		TXTextControl.SelectionFormField selectionFormField = new TXTextControl.SelectionFormField(1000);
		selectionFormField.Name = "company_country";
		selectionFormField.Items = new string[] { "United States", "Germany", "Italy" };
		selectionFormField.Editable = true;

		tx.FormFields.Add(selectionFormField);

		tx.InputPosition = new TXTextControl.InputPosition(-1, TXTextControl.TextFieldPosition.OutsideTextField);

		tx.Selection.Text = "\r\n\r\nTaxable:\r\n";

		// add a text form field
		TXTextControl.CheckFormField checkFormField = new TXTextControl.CheckFormField(false);
		checkFormField.Name = "company_taxable";
		checkFormField.CheckedCharacter = 'X';
		checkFormField.UncheckedCharacter = 'O';
		tx.FormFields.Add(checkFormField);

		// save in the internal format
		tx.Save(out bDocument, TXTextControl.BinaryStreamType.AdobePDF);
		tx.Save("test.pdf", TXTextControl.StreamType.AdobePDF);

	}

	return View(bDocument);
}