C# files

Week.cs

using System;
using System.Globalization;

namespace ProBill
{
  public class Week
  {
      public int Year;
      public int WeekOfYear;
      
      public Week()
      {
      }

      public Week(short year, short week)
      {
      this.Year = year;
      this.WeekOfYear = week;
      }


      public Week Including( DateTime Date )
      {
        Week output = new Week();
        GregorianCalendar cal = new GregorianCalendar(GregorianCalendarTypes.Localized);
        output.Year = Date.Year;
        output.WeekOfYear = cal.GetWeekOfYear(Date, CalendarWeekRule.FirstFourDayWeek, DayOfWeek.Monday);
        return( output );
      }
  }
}