GetLineNumber

using System;
using System.Linq;
namespace Testing_Console
{
    class Program
    {
        static void Main(string[] args)
        {
            // Part 1
            var watch  = new System.Diagnostics.Stopwatch();
            var length = 0;
            watch.Start();
            length = GetLineLength1("- Ivandro Ismael\r\n- Gomes Jao"); // Split
            watch.Stop();
            Console.WriteLine(watch.Elapsed + " " + length);
            watch.Reset();
            watch.Start();
            length = GetLineLength2("- Ivandro Ismael\r\n- Gomes Jao"); // Replace
            watch.Stop();
            Console.WriteLine(watch.Elapsed + " " + length);
            Console.ReadLine();
        }
        static char[] newLineChars = Environment.NewLine.ToArray();
        static int GetLineLength1(string line)
        {
            return line.Split(newLineChars, StringSplitOptions.RemoveEmptyEntries).Length;
        }

        static int GetLineLength2(string line)
        {
            return line.Length - line.Replace(Environment.NewLine, string.Empty).Length;
        }
    }
}