using System;

public class Program

{

    public static void Main()

    {

        int repeatInterVal = 2;

        DateTime eventDate = new DateTime(2014,02,22);

        DateTime repeatUntil = new DateTime(2014,08,22);

        string repeatOn = "Sat,Fri,Mon";

        var repeatOnArray = repeatOn.Split(',');

        Console.WriteLine("Today is: " + eventDate.DayOfWeek.ToString());

        var eventDateRepeated = eventDate;

        while (DateTime.Compare(eventDateRepeated, repeatUntil) < 0) 

        {

            var startDayInNextWeek = GetNextWeekday(eventDateRepeated, FindDayOfWeekByString(repeatOnArray[0]));

            for(var i=0; i<repeatOnArray.Length; i++)

            {       

                DateTime nextDay = GetNextWeekday(eventDateRepeated, FindDayOfWeekByString(repeatOnArray[i]));

                Console.WriteLine("Next " + repeatOnArray[i] + " is: " + nextDay.ToString());

                eventDateRepeated = nextDay;

            }

            eventDateRepeated = startDayInNextWeek.AddDays(14);

            Console.WriteLine("Next week begin at: " + eventDateRepeated.ToString());

        }

    }

    public static DateTime GetNextWeekday(DateTime start, DayOfWeek day)

    {

        // The (... + 7) % 7 ensures we end up with a value in the range [0, 6]

        int daysToAdd = ((int) day - (int) start.DayOfWeek + 7) % 7;

        return start.AddDays(daysToAdd);

    }

    public static DayOfWeek FindDayOfWeekByString(string day){

        switch(day) {

            case "Sun":

                return DayOfWeek.Sunday;

            case "Mon":

                return DayOfWeek.Monday;

            case "Tue":

                return DayOfWeek.Tuesday;

            case "Wed":

                return DayOfWeek.Wednesday;

            case "Thu":

                return DayOfWeek.Thursday;

            case "Fri":

                return DayOfWeek.Friday;

            case "Sat":

                return DayOfWeek.Saturday;

            default:

                return DayOfWeek.Saturday;

        }

    }

}