using System;

public class Example

{

   public static void Main()

   {

      Console.WriteLine("{0,35} {1,20} {2,20}", "Nearest", "Forward", "Backward");

       ShowDayOffsets(DayOfWeek.Sunday, DayOfWeek.Sunday);

       ShowDayOffsets(DayOfWeek.Sunday, DayOfWeek.Monday);

       ShowDayOffsets(DayOfWeek.Sunday, DayOfWeek.Tuesday);

       ShowDayOffsets(DayOfWeek.Sunday, DayOfWeek.Wednesday);

       ShowDayOffsets(DayOfWeek.Sunday, DayOfWeek.Thursday);

       ShowDayOffsets(DayOfWeek.Sunday, DayOfWeek.Friday);

       ShowDayOffsets(DayOfWeek.Sunday, DayOfWeek.Saturday);

       ShowDayOffsets(DayOfWeek.Wednesday, DayOfWeek.Wednesday);

​

   }

   private static void ShowDayOffsets(DayOfWeek startDay, DayOfWeek anchorDay)

   {

      string formula = String.Format("{0} -> {1} = ", startDay, anchorDay);

       Console.WriteLine("{0,-25} {1,9} {2,20} {3,20}", 

                       formula, 

                       Math.IEEERemainder(anchorDay - startDay, 7), 

                       (7 + anchorDay - startDay) % 7,

                       (((7 + anchorDay - startDay) % 7) - 7) % 7);  

   }

}