MaxNumberLectures

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace CountLechtures
{
    class CountLectures
    {
        static void Main(string[] args)
        {
            Console.Write("Enter starting date: ");
            var startingDate = DateTime.Parse(Console.ReadLine());
            Console.Write("Enter end date: ");
            var endDate = DateTime.Parse(Console.ReadLine());
            Console.Write("Day of the lectuce: ");
            string day = Console.ReadLine();

            DayOfWeek dayw = (DayOfWeek)Enum.Parse(typeof(DayOfWeek), day);

            int maxDaysCount = 0;
            while (startingDate <= endDate)
            {
                if (startingDate.DayOfWeek == dayw)
                {
                    maxDaysCount++;
                }
                startingDate = startingDate.AddDays(1);
            }
            Console.WriteLine(maxDaysCount);
        }
    }
}