using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        DateTime startDate = new DateTime(2022,1,1);

        DateTime endDate = new DateTime(2022,12,31);

        TimeSpan interval = endDate - startDate;

        int daysInInterval = interval.Days;

        int allowedDaysOfWeek = 0;

        DayOfWeek[] allowedWeekDays = { DayOfWeek.Monday, DayOfWeek.Tuesday };

​

        for (int i = 0; i <= daysInInterval; i++)

        {

            if (allowedWeekDays.Contains(startDate.AddDays(i).DayOfWeek))

            {

                allowedDaysOfWeek++;

            }

        }

        Console.WriteLine("Existem " + allowedDaysOfWeek + " dias permitidos entre " + startDate + " e " + endDate);

​

    }

}