Benchmark IsEmptyString function

Program.cs

using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MemoryTestSandbox
{
    class Program
    {
        static void Main(string[] args)
        {

            var summary = BenchmarkRunner.Run<MemoryTests>();

        }
    }



    [MemoryDiagnoser]
    public class MemoryTests
    {

        [GlobalSetup]
        public void Setup()
        {

        }

        [Benchmark]
        public int LambdaForm()
        {
            int count = 0;
            count += LambdaFormImpl("\t");
            count += LambdaFormImpl("");
            count += LambdaFormImpl("hello world");

            return count;
        }
        public int LambdaFormImpl(string statement)
        {
            bool result = string.IsNullOrWhiteSpace(statement) ||
                           statement.Any(x => !char.IsLetterOrDigit(x));

            return result ? 1 : 0;
        }


        [Benchmark]
        public int ExplicitForm()
        {
            int count = 0;
            count += ExplicitFormImpl("\t");
            count += ExplicitFormImpl("");
            count += ExplicitFormImpl("hello world");

            return count;
        }
        public int ExplicitFormImpl(string statement)
        {
            bool result = string.IsNullOrWhiteSpace(statement);

            if (result == false)
            {
                for (int i = 0; i < statement.Length; i++)
                {
                    bool valid = char.IsLetterOrDigit(statement[i]);

                    if (valid == true)
                    {
                        result = false;
                        break;
                    }
                }
            }

            return result ? 1 : 0;
        }
    }
}