How to copy a paragraph containing content controls to the end of document

Hi,

In my document I have paragraph which contains 2-3 content controls. I want to copy the whole paragraph including content controls and append at the end of document with a certain number of times using c# code. Without content controls I am able to copy the paragraph. How this should be achieved to copy the paragraph including content controls. I appreciate your help in advance.

Regards,

Imran