Örnek

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp7
{
    class Program
    {
        static void Main(string[] args)
        {

            int[] dizi = new int[10];

            for (int i = 0; i < dizi.Length; i++)
            {
                dizi[i] = 2 + 2 * i; 

            }

            for (int i = 0; i < dizi.Length; i++)
            {
                Console.WriteLine(dizi[i]);
            }

            Console.ReadKey();
        }
    }
}

foreach Yapısı

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp7
{
    class Program
    {
        static void Main(string[] args)
        {

            int[] dizi = { 45, 65, 85, 1, 10, 20, 50 };
            int toplam = 0;

            foreach (int rakam in dizi)
            {
                Console.WriteLine(rakam);
            }

            foreach (int rakam in dizi)
            {
                toplam = toplam + rakam;

            }
            Console.WriteLine(toplam);
            Console.ReadKey();
        }
    }
}

Örnek

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApp7
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            int[] array = {1,2,3,4,5,6,7,8};
            label1.Text = array[3].ToString();

        }
    }
}

Örnek

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApp7
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }


        string[] isimler = new string[5];
        int sayac = 0;
        private void button1_Click(object sender, EventArgs e)
        {
            isimler[sayac] = textBox1.Text;
            sayac++;

            if (sayac == 5)
            {
                sayac = 0;
            }
            label1.Text = (sayac + 1) + ". ismi giriniz";
            textBox1.Clear();
            textBox1.Focus();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            for (int i = 0; i < isimler.Length; i++)
            {
                listBox1.Items.Add(isimler[i]);
            }
        }
    }
}

Örnek

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp8
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] fib = new int[10];
            fib[0] = 1;
            fib[1] = 1;

            for (int i = 2; i < fib.Length; i++)
            {
                fib[i] = fib[i - 2] + fib[i - 1];
            }

            // for (int i = 0; i < fib.Length; i++)           yorum satırı

            foreach (int i in fib)
            {
                Console.Write("   " + i);
            }


            Console.ReadKey();
        }
    }
}