bm.cs

using System;
using System.Diagnostics;

namespace Stemmer
{
    internal class Benchmark : IDisposable
    {
        private readonly string _name;
        private Stopwatch _stopwatch;

        public Benchmark(string name)
        {
            _name = name;
            _stopwatch = new Stopwatch();
            _stopwatch.Start();
        }

        public void Dispose()
        {
            _stopwatch.Stop();

            Console.Write("- ");
            Console.ForegroundColor = ConsoleColor.Red;
            Console.Write("{0}", _name);
            Console.ResetColor();
            Console.Write(" took ");
            Console.ForegroundColor = ConsoleColor.Green;
            Console.Write("{0}", _stopwatch.ElapsedMilliseconds);
            Console.ResetColor();
            Console.WriteLine("ms");

            _stopwatch = null;
        }
    }
}