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 
        some more
        lines here";

        Match m = Regex.Match(test, "^", RegexOptions.Multiline);
        if (m.Success)
            Console.Write(m.Groups[0].Value);

Answer 1

Try this one:

Match m = Regex.Match(test, @".*\n", RegexOptions.Multiline);

Answer 2

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.

Answer 3

My 2 cents:

[^\n]*(\n|$)