What is the fastest way to count newlines in a large .NET string?

Question

Is there a way to improve this:

private static int CountNewlines(string s)
{
    int len = s.Length;
    int c = 0;
    for (int i=0; i < len;  i++)
    {
           


        

Answer 1

I'm pretty sure this won't be much slower than converting the string to bytes and checking those, if not faster. The String class should be highly optimized.

If this is a big string, maybe a parallel execution by several threads will make things faster :-)