determine rest of week with DateTime

I was just playing around some more with this and I found that this simpler (though more cryptic) version also works:

using System;

class Program
{
    static void Main()
    {
        DateTime dt = new DateTime(2007, 12, 17);
        int rest = RestOfWeek(dt);
        Console.WriteLine(rest); // 4       
        Console.ReadLine();
    }
   

    static int RestOfWeek(DateTime dt)
    {
        int rest = 5 - (int)dt.DayOfWeek;
        if (rest == -1) rest  = 5;
        return rest; 
    } 
}

The reason it works is because in the DayOfWeek enum, Sunday has a  a value of 0, Monday a value of 1 and so on up to 6 for Saturday.

This should work OK:

using System;

class Program
{
    static void Main()
    {
        DateTime dt = new DateTime(2007, 12, 17);
        int rest = RestOfWeek(dt);
        Console.WriteLine(rest); // 4
        Console.ReadLine();
    }
   

    static int RestOfWeek(DateTime dt)
    {
        switch (dt.DayOfWeek)
        {
           case DayOfWeek.Saturday:
           case DayOfWeek.Sunday:
              return 5;
           case DayOfWeek.Monday:
              return 4;
           case DayOfWeek.Tuesday:
              return 3;
           case DayOfWeek.Wednesday:
              return 2;
           case DayOfWeek.Thursday:
              return 1;
           default:
              return 0;
        }
    } 
}

Incidentally, according to my calendar, 12 April 2009 is a Sunday and 4 December 2009 is a Friday. So, I've done the example on a date we can both agree was a Monday, 17 December 2007 :)