I have resorted to taking care of this in the stored procedure. If you have a good way of doing it inside of Visual Studio, let me know in the comments!
The T-SQL looks like this. I believe I got the trick from here.
CASE WHEN LEN(PhoneNumber1) = 10 THEN '(' + Stuff(Stuff(PhoneNumber1,7,0,'-'),4,0,') ') ELSE Stuff(RIGHT(PhoneNumber1,7),4,0,'-') END as PhoneNumber1,