I am trying to see if the string contains a specific format. For example if someone types a phone number 1234567890 I need to force a person to enter a phone number in a specific format. 
(###) ###-####. I am make changes to a vended program where the design of the program is terrible where you cannot force the formatting within a form. So, I was wondering if there is a way to use string.contains("(###) ###-####") or any other help would be greatly appreciated.