using System;

using System.Linq;  // required to see Aggregate on []

//using System.Collections.Generic;

​

public class Program

{

    struct TestPerson

    {

        public string FirstName;

        public string LastName;

        public int Age;

        public DateTime LastLogged;

        public override string ToString() 

        {

            return FirstName + " " + LastName + " : " + Age.ToString();

        }

    }

    public static void TestInitializers()

    {

        int[] ints = new int[] { 1,2,3,21,22,23,11,12,13};

        TestPerson[] pers = new TestPerson[] { ( new TestPerson{ FirstName="James", LastName="Bond", Age=41} ), ( new TestPerson{ FirstName="Chuck", LastName="Norris", Age=999} ) };

        var  obx = new [] { ( new {fname="ala", lname="Nowak"}), (new {fname="James", lname="Bond"}) };

        pers[0].Dump();

        Console.WriteLine("Persons: {0}", pers);

        Console.WriteLine("obx: {0}", obx);             // works fine only for var ; for dynamic runtime error; work fine for objects (if table the first object is taken)

        Console.WriteLine("var obx[] {0}", obx.Aggregate("", (acu, ato) => ato.fname + " " + ato.lname + ";" + acu));

        Console.WriteLine("var obx[] {0}", obx.Aggregate("", (acu, ato) => ato.ToString() + ";" + acu));

        // obx.Dump();  // runtime error; 

        Console.WriteLine("Persons: {0}", pers.Aggregate("", (acu,ato) => ato.ToString() + ";" + acu));

    }

    public static void Main()

    {

        Console.WriteLine("start: {0}", DateTime.Now.ToString("hh:mm:ss") );

        TestInitializers();

    }

}