How to create pdf file programmatically and write some data's on the newly created pdf file ?

I've used PDF Duo .NET component of duodimension software. It works great. The advantage of it that you can create the PDF using HTML markup. You don't need to check the help docs for special API functions. For example:

• // Create new pdf
• string html = "I'm creating a new PDF file";
• DuoDimension.HtmlToPdf conv = new DuoDimension.HtmlToPdf();
• // Set parameters and save pdf
• conv.PageInfo.PageFormat = DuoDimension.ePageFormat.A4;
• conv.PageInfo.PageOrientation = DuoDimension.ePageOrientation.Portrait;
• conv.OpenHTML(html);
• conv.SavePDF(file_pdf);