using System;

using System.Globalization;

public class Program

{

    public static void Main()

   {

      // Create an array of all supported standard date and time format specifiers.

      string[] formats = {"d", "D", "f", "F", "g", "G", "m", "o", "r", 

                          "s", "t", "T", "u", "U", "Y"};

      // Create an array of four cultures.                                 

      CultureInfo[] cultures = {CultureInfo.CreateSpecificCulture("en-GB"), 

                                CultureInfo.CreateSpecificCulture("en-US"), 

                                CultureInfo.CreateSpecificCulture("nb-NO")};

       // Define date to be displayed.

      DateTime dateToDisplay = new DateTime(2020, 10, 1, 17, 4, 32);

​

      // Iterate each standard format specifier.

      foreach (string formatSpecifier in formats)

      {

         foreach (CultureInfo culture in cultures)

            Console.WriteLine("{0} Format Specifier {1, 10} Culture {2, 40}", 

                              formatSpecifier, culture.Name, 

                              dateToDisplay.ToString(formatSpecifier, culture));

         Console.WriteLine();

      }   

   }

}