How to take only first line from the multiline text

Question

How can I get only the first line of multiline text using regular expressions?

        string test = @\"just take this first line
        even there is 
                 


        

Answer 1

If you just need the first line, you can do it without using a regex like this

var firstline = test.Substring(0, test.IndexOf(Environment.NewLine));

As much as I like regexs, you don't really need them for everything, so unless this is part of some larger regex exercise, I would go for the simpler solution in this case.