using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(AddWorkingDays(new DateTime(2019, 07, 26), 1).ToShortDateString());

    }

    public static DateTime AddWorkingDays(DateTime date, int days) {

        while (days > 0) {

            date = date.AddDays(1);

            if (!IsHoliday(date)) days--;

        }

        return date;

    }

    public static bool IsHoliday(DateTime date) { return date.DayOfWeek == DayOfWeek.Sunday || date.DayOfWeek == DayOfWeek.Saturday; }

}