static private void ShowFirstPageContent(string filename)
{
PdfDocument document = new PdfDocument();
document.Load(filename, false);
PdfContents contents = document.Catalog.Pages[0].Contents;
// Get a parser for decoding the contents of the page
PdfContentsParser parser = contents.CreateParser();
// Keep getting new content commands until no more left
PdfObject obj = null;
while ((obj = parser.GetObject()) != null)
{
Console.WriteLine(obj);
}
document.Close();
}