How to get button Id if my page has duplicate user controls?

Question

Hi All,

 

I got a functionality like below. Please share your experience or thoughts.

 

I have a user control and it has one text box and 2 buttons (add, remove). User control will be added dynamically based on functionality. But How to know add, remove id controls in .aspx (Page_load) function to know which button user has clicked?

 

If anybody has real time experience on this please share your thoughts and please do not provide any links as i already googled in the internet.

 

Regards,

Sudheer