using System;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        int[] a=new int[10];

        a = func(2,10);

        for(int i=0; i<10; i++)

        {

            Console.WriteLine(a[i]);

        }

        foreach(var item in func2(2,10))

        {

            Console.WriteLine(item);

        }

        //Console.Read();

    }

    public static int[] func(int start, int number)

    {

        int[] _number = new int[number];

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

        {

            _number[i] = start + 2 * i;

        }

        return _number;

    }

    public static IEnumerable<int> func2(int start, int number)

    {

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

        {

            yield return start + 2 * i;

        }

    }

}