How to Find Start Date and End Date of a Week in given Date

This is some thing i was really working hard on to find out. And it is a common thing we might need most of the time. Suppose we need to find the Start Date and End date of this week. Only thing I can reach programatically is Current Date. In C# it's

DateTime currentDate = DateTime.NOW;

Here is the code snippet to find the Start Date and Last Date of this week.

DateTime currentDate = DateTime.Now;
int week = myCal.GetWeekOfYear(currentDate , System.Globalization.DateTimeFormatInfo.CurrentInfo.CalendarWeekRule, DayOfWeek.Monday);
DateTime BeginingOfYear = new DateTime(DateTime.Now.Year, 1, 1);
System.Globalization.Calendar D = System.Globalization.CultureInfo.CurrentCulture.Calendar;
DateTime Weeks = D.AddWeeks(BeginingOfYear, Convert.ToInt32(week));

DateTime FirstDayOfWeek = Weeks.Subtract(new TimeSpan((int)Weeks.DayOfWeek, 0, 0, 0));

DateTime LastDayOfWeek = FirstDayOfWeek.AddDays(7);

Here We can Replace the current Date with the Date, Date that you have given.

Regards

Lakmal Kankanamge