iTextSharp

 private void button13_Click_1(object sender, EventArgs e)
        {
            GeraRelatorio(@"C:\Users\Hiroyuki\Desktop\ArquivoPDF");

        }

        private void GeraRelatorio(string CaminhoDoArquivo) {

            Document documento = new Document();
            PdfWriter.GetInstance(documento, new FileStream(CaminhoDoArquivo, FileMode.Create));

            try
            {
                Paragraph p = new Paragraph(//////);
                documento.Open();
                documento.Add(p);
                documento.Close();

            }
            catch (Exception e) {
                MessageBox.Show(e.StackTrace);
            }

        }