using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Enter values.  Enter no value to continue");

        var values = RequestText().ToArray();

        Console.WriteLine("Your values were:\n" + string.Join("\n", values));

    }

    private static IEnumerable<string> RequestText() {

        var count = 0;

        while(true) {

            Console.WriteLine("Enter value " + (count++));

            var input = Console.ReadLine();

            if (string.IsNullOrEmpty(input)) {

                // End the enumerable so MoveNext returns false

                yield break;

            }

            // Return the next value so MoveNext returns true and Current is set to input

            yield return input;

        }

    }

}