Format a Social Security Number (SSN) as XXX-XX-XXXX from XXXXXXXXX

Question

I am getting a social security number (SSN) from a data warehouse. While posting it to a CRM I want it to be formatted like XXX-XX-XXXX instead of XXXXXXXXX.

It's like converting a simple string with dashes at positions 4 and 7. I am pretty new to C#, so what is the best way to do this?

Answer 1

For a simple, short, and self commenting solution, try:

String.Format("{0:000-00-0000}", 123456789) 

123456789 representing your SSN variable.