using System;

​

public class Program

{

    public static void Main()

    {

        DateTime StartOfWeek = DateTime.Today.AddDays(-(int)DateTime.Today.DayOfWeek - 1);

        DateTime EndOfWeek = StartOfWeek.AddDays(6);

        DateTime FridayWeekEnding = DateTime.Today.AddDays(5 - (int)DateTime.Today.DayOfWeek);

        DateTime FutureDate = new DateTime(2020, 3, 1);

        DateTime FutureFridayWeekEnding = FutureDate.AddDays(5 - (int)FutureDate.DayOfWeek);

        Console.WriteLine("Start Of Week: {0}, End of Week: {1}", StartOfWeek.ToString("ddd dd MMM yyyy"), EndOfWeek.ToString("ddd dd MMM yyyy"));

        Console.WriteLine("Friday Week Ending: {0}, Day Name: {1}", FridayWeekEnding.ToString("dd/MM/yyyy"), FridayWeekEnding.DayOfWeek);

        Console.WriteLine();

        Console.WriteLine("Future Date: {0}. Day Name: {1}", FutureDate.ToString("dd/MM/yyyy"), FutureDate.DayOfWeek);

        Console.WriteLine("Future Friday Week Ending: {0}. Day Name: {1}", FutureFridayWeekEnding.ToString("dd/MM/yyyy"), FutureFridayWeekEnding.DayOfWeek);

        FutureDate = new DateTime(2020, 2, 29);

        FutureFridayWeekEnding = FutureDate.AddDays(5 - (int)FutureDate.DayOfWeek);

        Console.WriteLine();

        Console.WriteLine("Future Date: {0}. Day Name: {1}", FutureDate.ToString("dd/MM/yyyy"), FutureDate.DayOfWeek);

        Console.WriteLine("Future Friday Week Ending: {0}. Day Name: {1}", FutureFridayWeekEnding.ToString("dd/MM/yyyy"), FutureFridayWeekEnding.DayOfWeek);

    }

}