how to place - in a string

Question

I have a string "8329874566". I want to place - in the string like this "832-98-4566"

Which string function can I use?

Answer 1

I would have done something like this..

  string value = "8329874566";
  value = value.Insert(6, "-").Insert(3, "-");

Answer 2

You convert it to a number and then format the string. What I like most about this is it's easier to read/understand what's going on then using a few substring methods.

string str = "832984566";
string val = long.Parse(str).ToString("###-##-####");