in button click event how to export & delete file at a time in vb.net

Question

Hi,

 
in windows form in button click event how to export the file in a location select by showdialog  & it will be delete permanently at a same time.How can i do this!
 because in .net it will produces error "IO Exception was unhandled" or "The process can not access the file because it is used by anather process." .In button click event how to export the file & delete at same time in vb.net windows application.Please give me the links & urls about that issue.

thanks,