using System;

​

public class Program

{

    public static void Main(string[] args)

    {

        var week = new WorkWeek(DateTime.Now);

        Console.WriteLine($"Today: {week.Today}");

        Console.WriteLine($"First Of Week: {week.FirstDayOfWorkWeek:d} - {week.FirstDayOfWorkWeek.DayOfWeek}");

        Console.WriteLine($"Last Of Week: {week.LastDayOfWorkWeek:d}- {week.LastDayOfWorkWeek.DayOfWeek}");

        Console.WriteLine($"Press Any Key to continue...");

        Console.ReadLine();

    }

}

​

public class WorkWeek

{

    public WorkWeek(DateTime input)

    {

        var date = (int) input.DayOfWeek;

        Today = input;

        FirstDayOfWorkWeek = input.AddDays(-date);

        LastDayOfWorkWeek = FirstDayOfWorkWeek.AddDays(6);

    }

    public DateTime Today { get; set; }

    public DateTime FirstDayOfWorkWeek{ get; set; }

    public DateTime LastDayOfWorkWeek{ get; set; }

}