C # Get time period

DateTime today = dt. date;//Today 00:00:00
DateTime tomorrow = dt. Date.adddays (1);//Tomorrow 00:00:00
DateTime startweek = dt. AddDays (1-convert.toint32 (dt. Dayofweek.tostring ("D"))).  Date;; This Monday
DateTime Startnextweek = startweek.adddays (7).  Date; Next Monday
DateTime startmonth = new datetime (dt. Year, dt.  Month, 1); Early this month
DateTime startnextmonth = new datetime (dt. Year, dt.  Month + 1, 1); Early next month
DateTime startyear = new datetime (dt.  Year, 1, 1); Early this year
DateTime startnextyear = new datetime (dt.  Year + 1, 1, 1); Early next year

Acquisition

C # Get time period