using System;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        var text = @"

        // Take out this comment, and it works. Leave it in and the output is a blank line.

      X + Y";

        var lines = text.Split(new string[] { Environment.NewLine }, StringSplitOptions.None);

        Console.Write(lines.Count());                           

    }

}