using System;

using System.Diagnostics;

using System.Linq;

​

public class Person

{

    public string GivenName { get; set; }

    public string MiddleName { get; set; }

    public string FamilyName { get; set; }

​

    // Method 1: Using Aggregate and Trim

    public string NameUsingAggregate =>

        new[] { GivenName, MiddleName, FamilyName }

        .Where(name => !string.IsNullOrWhiteSpace(name))

        .Aggregate("", (current, name) => current + " " + name).Trim();

​

    // Method 2: Using string.Join

    public string NameUsingStringJoin

    {

        get

        {

            return string.Join(" ", new[] { GivenName, MiddleName, FamilyName }.Where(name => !string.IsNullOrWhiteSpace(name)));

        }

    }

​

    // Method 3: Using string.Concat and Select

    public string NameUsingStringConcat =>

        string.Concat(new[] { GivenName, MiddleName, FamilyName }

        .Where(name => !string.IsNullOrWhiteSpace(name))

        .Select(name => name + " ")).Trim();

}

​

class Program

{

    static void Main()

    {

        var person = new Person

        {

            GivenName = "Kenneth",

            MiddleName = "Skodde",

            FamilyName = "Myhra"

        };

​

        const int iterations = 1000000;

​

        // Measure Method 1

        var stopwatch = Stopwatch.StartNew();

        var initialMemory = GC.GetTotalMemory(true);

​

        for (int i = 0; i < iterations; i++)

        {

            var name = person.NameUsingAggregate;

        }

​

        stopwatch.Stop();

        var finalMemory = GC.GetTotalMemory(true);

        var elapsedTimeMethod1 = stopwatch.ElapsedMilliseconds;

        var memoryUsedMethod1 = finalMemory - initialMemory;

​

        // Measure Method 2

        stopwatch.Restart();

        initialMemory = GC.GetTotalMemory(true);

​

        for (int i = 0; i < iterations; i++)

        {

            var name = person.NameUsingStringJoin;

        }

​

        stopwatch.Stop();

        finalMemory = GC.GetTotalMemory(true);

        var elapsedTimeMethod2 = stopwatch.ElapsedMilliseconds;

        var memoryUsedMethod2 = finalMemory - initialMemory;

​

        // Measure Method 3

        stopwatch.Restart();

        initialMemory = GC.GetTotalMemory(true);

​

        for (int i = 0; i < iterations; i++)

        {

            var name = person.NameUsingStringConcat;

        }

​

        stopwatch.Stop();

        finalMemory = GC.GetTotalMemory(true);

        var elapsedTimeMethod3 = stopwatch.ElapsedMilliseconds;

        var memoryUsedMethod3 = finalMemory - initialMemory;

​

        Console.WriteLine($"Method 1 (Aggregate): Time = {elapsedTimeMethod1} ms, Memory = {memoryUsedMethod1} bytes");

        Console.WriteLine($"Method 2 (string.Join): Time = {elapsedTimeMethod2} ms, Memory = {memoryUsedMethod2} bytes");

        Console.WriteLine($"Method 3 (string.Concat): Time = {elapsedTimeMethod3} ms, Memory = {memoryUsedMethod3} bytes");

    }

}

​