using System;

public class Program

{

    static public string RandomDigits(int length)

        {

            var random = new Random();

            string s = string.Empty;

            char[] alphabets = { 'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'};

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

                s = String.Concat(s, alphabets[random.Next(0,26)].ToString()+" ");

            Console.WriteLine(s);

            return s;

        }   

    public static void Main()

    {

        Console.WriteLine("Hello World");

        Console.WriteLine(RandomDigits(7));

    }

}

​

​

​

​

​

​