C # Gets the current date, time, quarter

1DateTime dt = DateTime.Now;//Current Time2DateTime startweek = dt. AddDays (1-Convert.ToInt32 (dt. Dayofweek.tostring ("D")));//this Monday3DateTime Endweek = Startweek.adddays (6);//this Sunday4 5DateTime startmonth = dt. AddDays (1-DT. Day);//Early this month6DateTime Endmonth = startmonth.addmonths (1). AddDays (-1);//Month End//7 8Endmonth = startmonth.adddays (dt. AddMonths (1)-DT). Days-1);//Month End9DateTime startquarter = dt. AddMonths (0-(dt. Month-1) %3). AddDays (1-DT. Day);//At the beginning of the quarterTenDateTime Endquarter = startquarter.addmonths (3). AddDays (-1);//At the end of the quarter One  ADateTime startyear =NewDateTime (dt. Year,1,1);//early this year -DateTime endyear =NewDateTime (dt. Year, A, to);//at the end of this year for yesterday, tomorrow, last week, last month, last quarter, last year, etc. -  the varLast Monday = DateTime.Now.AddDays (Convert.ToInt32 (1-Convert.ToInt32 (DateTime.Now.DayOfWeek))-7);//last Monday - varLast weekend = DateTime.Now.AddDays (Convert.ToInt32 (1-Convert.ToInt32 (DateTime.Now.DayOfWeek))-7). AddDays (6);//last weekend (Sunday)//next week - varNext Monday = DateTime.Now.AddDays (Convert.ToInt32 (1-Convert.ToInt32 (DateTime.Now.DayOfWeek)) +7);//Next Monday - varNext weekend = DateTime.Now.AddDays (Convert.ToInt32 (1-Convert.ToInt32 (DateTime.Now.DayOfWeek)) +7). AddDays (6);//next weekend +  -DateTime.Parse (DateTime.Now.Year.ToString () + DateTime.Now.Month.ToString () +"1"). AddMonths (1). AddDays (-1). ToShortDateString ();//Last day + //It 's easier to use ToString's character formatting in C # ADateTime.Now.ToString ("yyyy-mm-01");//early this month atDateTime.Parse (DateTime.Now.ToString ("yyyy-mm-01")). AddMonths (1). AddDays (-1). ToShortDateString ();//last day of the month -DateTime.Parse (DateTime.Now.ToString ("yyyy-mm-01")). AddMonths (-1). ToShortDateString ();//last month, 1th . -DateTime.Parse (DateTime.Now.ToString ("yyyy-mm-01")). AddDays (-1). ToShortDateString ();//last day of last month -DateTime.Parse (DateTime.Now.ToString ("yyyy-mm-01")). AddMonths (1). ToShortDateString ();//next month, number 1th . -DateTime.Parse (DateTime.Now.ToString ("yyyy-mm-01")). AddMonths (2). AddDays (-1). ToShortDateString ();//The last day of next month -DateTime.Now.AddDays (7). ToShortDateString ();//after 7 days inDateTime.Now.AddDays (-7). ToShortDateString ();//7 days ago -DateTime.Now.Date.ToShortDateString ();//This year, formatting with ToString's characters makes it easy to figure out the first and last day of the year to  +DateTime.Parse (DateTime.Now.ToString ("yyyy-01-01")). ToShortDateString ();//first day of the year -DateTime.Parse (DateTime.Now.ToString ("yyyy-01-01")). AddYears (1). AddDays (-1). ToShortDateString ();//last day of the year the  *DateTime.Parse (DateTime.Now.ToString ("yyyy-01-01")). AddYears (-1). ToShortDateString ();//on the first day of last year, $DateTime.Parse (DateTime.Now.ToString ("yyyy-01-01")). AddDays (-1). ToShortDateString ();//on the last day of the previous year,Panax Notoginseng  -DateTime.Parse (DateTime.Now.ToString ("yyyy-01-01")). AddYears (1). ToShortDateString ();//first day of next year theDateTime.Parse (DateTime.Now.ToString ("yyyy-01-01")). AddYears (2). AddDays (-1). ToShortDateString ();//last day of next year + //this quarter, ADateTime.Now.AddMonths (0-((DateTime.Now.Month-1) %3)). AddDays (1-DateTime.Now.Day);//the first day of the quarter; theDateTime.Parse (DateTime.Now.AddMonths (3-((DateTime.Now.Month-1) %3)). ToString ("yyyy-mm-01")). AddDays (-1). ToShortDateString ();//The last day of the quarter +DateTime.Now.AddMonths (3-((DateTime.Now.Month-1) %3)). ToString ("yyyy-mm-01");//the first day of the next quarter -DateTime.Parse (DateTime.Now.AddMonths (6-((DateTime.Now.Month-1) %3)). ToString ("yyyy-mm-01")). AddDays (-1). ToShortDateString ();//last day of next quarter $  $DateTime.Now.AddMonths (-3-((DateTime.Now.Month-1) %3)). AddDays (1-DateTime.Now.Day);//first day of last quarter -DateTime.Now.AddMonths (0-((DateTime.Now.Month-1) %3)). AddDays (1-DateTime.Now.Day). AddDays (-1). ToShortDateString ();//last day of the previous quarter

C # Gets the current date, time, quarter