Patrick,
Your temp string has 10 digits :)

The code below should do what you want:

string ssn = "123456789";
MessageBox.Show(ssn.Insert(3,"-").Insert(6,"-"));

Einar

>Do anyone know of a simple way to convert a 9 digit string to a SSN format?
>
>For example:
>
>string temp = "1234567890";
>MessageBox.Show(temp.ToString("000-00-0000"));
>
>Of course, the above does not work, but there should be an easy way of doing this.
>
>Thanks,
>Pat Moran