using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        foreach(var item in GetWorkDays(DateTime.Today, 7))

        Console.WriteLine("Hello World");

    }

    public static IEnumerable<DateTime> GetWorkDays(DateTime startDay, int daysCount)

        {

            //    Where(day => day.DayOfWeek != DayOfWeek.Sunday && day.DayOfWeek != DayOfWeek.Saturday))

​

            DateTime date = startDay;

            while (date.AddDays(1) != startDay.AddDays(daysCount))

            {

                date = date.AddDays(1);

​

                yield return System.Linq.Enumerable.Select(new DateTime[] { date }, day =>

                                                           {

                                                               while (!(day.DayOfWeek != DayOfWeek.Sunday && day.DayOfWeek != DayOfWeek.Saturday))

                                                               {

                                                                   day = day.AddDays(1);

                                                               }

                                                               return day;

                                                           });

            }

        }

}

​

​