using System;

public class Program

{

    public static void Main()

    {

        var date = DateTime.Now;

        var formatWithPlaceHolderForDate =  "{0:yyyy.MM.dd}";   

        Console.WriteLine(string.Format(formatWithPlaceHolderForDate, date));

        var format =  " ";  

        Console.WriteLine(string.Format(format, date));

        format =  "";   

        Console.WriteLine(string.Format(format, date));

    }

}