.net - Easiest way to extract 4 digit number out of string? -

if know string going like:

abc xyz 5678

or

qweroi yreoiu 4679

what best way extract last 4 digit string?

in c# whole thing

string mystring = "qweroi yreoiu 4679"; regex regex = new regex(@"\d{4}$"); match result = regex.match(mystring); 

you can use .tostring() if need keep working match. additional information regex recommend this article.