How Do I Add A Header/Footer To A Pdf Document Containing Tables That Overlaps To Other Pages Using Itextsharp. The Header Should Appear On Everypage

using (PdfWriter writer = PdfWriter.GetInstance(doc, fs))
                {
                    //now inserting header
                    writer.PageEvent = new Header();

                    // end of header
                    // Step 4: Openning the Document
                    doc.Open();
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}