Word count

wordCount.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;

namespace ConsoleApp9
{
    class Program
    {
        static void Main(string[] args)
        {
            var results = BenchmarkSwitcher.FromAssembly(typeof(Program).GetTypeInfo().Assembly).Run(args);
            foreach (var res in results)
            {
                Console.WriteLine(res);
            }
            Console.ReadLine();
        }
    }
    public class Worker
    {
        public static string[] Data = File.ReadLines(@"SOME_FILE").ToArray();

        [Benchmark(OperationsPerInvoke = 4)]
        public (string Word, int Count)[] Dict()
        {
            var tbl = new Dictionary<string, int>();
            foreach (var line in Data)
            {
                tbl[line] = tbl.ContainsKey(line) ? tbl[line] += 1 : tbl[line] = 1;
            }
            return tbl.Select(kv => (kv.Key, kv.Value)).ToArray();
        }

        [Benchmark(OperationsPerInvoke = 4)]
        public (string Word, int Count)[] Linq()
        {
            return Data.GroupBy(x => x).Select(x => (x.Key, x.Count())).ToArray();
        }
    }
}