using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var stringListA = new List<string>();       

        var stringListB = new List<string> { "blub" };      

        var stringListC = new List<string> { "blub", "blab" };

​

        Console.WriteLine(string.Join(", ", stringListA));      

        Console.WriteLine(string.Join(", ", stringListB));

        Console.WriteLine(string.Join(", ", stringListC));

    }

}