How to add page number in C# generated PDF. Format "Page 1of n"

Question

In my C# code which publishes certain data into PDF, I am looking for a way to put page number in the footer (left, center or right indexed) in the format "Page 1 of n", n being the total number of pages.

Below is my code.

using (SaveFileDialog sfd = new SaveFileDialog() { Filter = "PDF file|*.pdf", ValidateNames = true })
{
    if (sfd.ShowDialog() == DialogResult.OK)
    {
        iTextSharp.text.Document doc = new iTextSharp.text.Document(PageSize.A4.Rotate(), 50f, 50f, 50f, 50f);
        {
            try
            {
                //Main pdf publishing code follows
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Error! try again.", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            finally
            {
                doc.Close();
            }
        }
    }
}