first day of week help

[Bigbacon]

using C# and ASP.Net

I need to find the date of the first day in a given week BUT the first day of any week in a monday and the last day of any week is a sunday.

so example if I used a date of 1/1/2012, the first day of that given week would be 12/27/2011

also need the same thing for the end of a week.

so if I had 12/30/2012 then I would get 12/30/2012 since the last day of a given week would be a sunday.

 

[noobman]

DateTime input = //...
int delta = DayOfWeek.Monday - input.DayOfWeek;
DateTime monday = input.AddDays(delta);

See this StackOverflow link