using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        List<string> bikes = new List<string>();

        bikes.Add("Krysia"); // string nr 1

        bikes.Add("Sandra"); // string nr 2

        bikes.Add("Magda"); // string nr 3

        string bikesName= string.Join(",", bikes.ToArray());  // wyswietl polaczone stringi

        Console.WriteLine(bikesName);

    }

}