Getting week of the month from a Date

Getting week of the month from a DateTime variable

// ---- GetWeekOfMonth ---------------------------  //  // Assuming Sunday starts a new week, get the ordinal  // week a date is in...of the date's month  // using Microsoft.VisualBasic;  int GetWeekOfMonth(DateTime Date)  {  long Week;  // get first day of month  DateTime BaseDate = new DateTime(Date.Year, Date.Month, 1);  // get difference, in weeks, between the date and first day of month  Week = DateAndTime.DateDiff(DateInterval.WeekOfYear,   BaseDate,   Date,   Microsoft.VisualBasic.FirstDayOfWeek.Sunday,   FirstWeekOfYear.Jan1);    // want it one, not zero based  return (int)Week + 1;  }  // test it  protected void Button1_Click(object sender, EventArgs e)  {  DateTime Date = new DateTime(2007, 3, 1);  while (Date.Month == 3)  {  int Week = GetWeekOfMonth(Date);  Response.Write(String.Format("{0:d} : {1} <BR>", Date, Week));  Date = Date.AddDays(1);  }  }