using System;

using System.Globalization;                 

​

public class Program

{

    public static void Main()

    {

        var d = DateTime.Now;

        Console.WriteLine("Date format (long):  {0}", d.ToString("D", CultureInfo.InvariantCulture));

        Console.WriteLine("Date format (short): {0}", d.ToString("d", CultureInfo.InvariantCulture));

        Console.WriteLine("Full format (long):  {0}", d.ToString("F", CultureInfo.InvariantCulture));

        Console.WriteLine("Full format (short): {0}", d.ToString("f", CultureInfo.InvariantCulture));

        Console.WriteLine("Time format (long):  {0}", d.ToString("T", CultureInfo.InvariantCulture));

        Console.WriteLine("Time format (short): {0}", d.ToString("t", CultureInfo.InvariantCulture));

        Console.WriteLine("General format (long):  {0}", d.ToString("G", CultureInfo.InvariantCulture));

        Console.WriteLine("General format (short): {0}", d.ToString("g", CultureInfo.InvariantCulture));

    }

}