Create PDF form XObjects in C# and VB.NET

using System;
using SautinSoft.Pdf;
using System.IO;

class Program
{
	static void Main()
	{
		// This property is necessary only for licensed version.
		//SautinSoft.Pdf.Serial = "XXXXXXXXXXX";

		using (var document = new PdfDocument())
		{
			var form = new PdfForm(document, new PdfSize(200, 200));

			form.Content.BeginEdit();

			var textGroup = form.Content.Elements.AddGroup();

			// Add text with the default fill (fill will be inherited from outer PdfFormContent).
			using (var formattedText = new PdfFormattedText())
			{
				formattedText.Font = new PdfFont("Hello", 24);
				formattedText.Append("SautinSoft!");

				// Draw the formatted text at location (50, 150) from the bottom-left corner of the group/form.
				textGroup.DrawText(formattedText, new PdfPoint(50, 150));
			}

			// Add the same text with a black fill 50 points below the first text.
			var blackText = (PdfTextContent)textGroup.Elements.AddClone(textGroup.Elements.First);
			blackText.TextTransform = PdfMatrix.CreateTranslation(0, -50) * blackText.TextTransform;
			blackText.Format.Fill.Color = PdfColors.Black;

			var pathGroup = form.Content.Elements.AddGroup();

			// Add a rectangle path with the default fill (fill will be inherited from the outer PdfFormContent).
			var path = pathGroup.Elements.AddPath();
			path.AddRectangle(0, 50, 200, 40);
			path.Format.Fill.IsApplied = true;

			// Add the same path with a black fill 50 points below the first path.
			var blackPath = pathGroup.Elements.AddClone(path);
			blackPath.Subpaths.Transform(PdfMatrix.CreateTranslation(0, -50));
			blackPath.Format.Fill.Color = PdfColors.Black;

			form.Content.EndEdit();

			var page = document.Pages.Add();

			// Add the outer PdfFormContent with the default (black) fill.
			// Elements in the inner PdfForm that do not have a fill set, will have the default (black) fill.
			var contentGroup = page.Content.Elements.AddGroup();
			var formContent1 = contentGroup.Elements.AddForm(form);
			formContent1.Transform = PdfMatrix.CreateTranslation(100, 600);

			// Add the outer PdfFormContent with a green fill.
			// Elements in the inner PdfForm that do not have a fill set, will have a green fill.
			contentGroup = page.Content.Elements.AddGroup();
			var formContent2 = contentGroup.Elements.AddForm(form);
			formContent2.Transform = PdfMatrix.CreateTranslation(100, 350);
			formContent2.Format.Fill.Color = PdfColors.Green;

			// Add the outer PdfFormContent with a red fill.
			// Elements in the inner PdfForm that do not have a fill set, will have a red fill.
			contentGroup = page.Content.Elements.AddGroup();
			var formContent3 = contentGroup.Elements.AddClone(formContent1);
			formContent3.Transform = PdfMatrix.CreateTranslation(100, 100);
			formContent3.Format.Fill.Color = PdfColors.Red;

			document.Save("FormXObjects.pdf");
		}
	}
}