regular expression: extract last 2 characters

Question

what is the best way to extract last 2 characters of a string using regular expression.

For example, I want to extract state code from the following

\"A_IL\"

Answer 1

Use /(..)$/, then pull group 1 (.groups(1), $1, \1, etc.).

Answer 2

as for the best way, I'd say it's .{2}$ it is more elegant and self-descriptive.

Answer 3

Use the regex:

 ..$

This will return provide the two characters next to the end anchor.

Since you're using C#, this would be simpler and probably faster:

string fullexpression = "A_IL";
string StateCode = fullexpression.Substring(fullexpression.Length - 2);