using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Diagnostics;

namespace ConsoleApplication
{
    class Program
    {
        static void Main(string[] args)
        {
            Func<string, string> pathFunc1 = x => x.TrimEnd('\\') + @"\";
            Func<string, string> pathFunc2 = x => x.EndsWith(@"\") ? x : x + @"\";
            List<Func<string, string>> pathFunc = new List<Func<string, string>>() { pathFunc1, pathFunc2 };
            List<string> testPath = new List<string>() { @"c:\test", @"c:\test\", @"c:\test\\" };
            pathFunc.ForEach(x => testPath.ForEach(y => Cycle(x, y, 1000000)));
            Console.Read();
        }

        private static void Cycle(Func<string, string> pathFunc, string path, int cycle)
        {
            var sw = new Stopwatch();
            string newPath = null;
            sw.Start();
            for (int i = 0; i < cycle; i++)
            {
                newPath = pathFunc(path);
            }
            sw.Stop();
            Console.WriteLine(string.Format(@"Method: '{0}' Time(ms): {1} Old path: '{2}' New path: '{3}'", pathFunc.Method.Name, sw.ElapsedMilliseconds, path, newPath));
        }
    }
}