C # gets Date function classes for Monday and Sunday

#regionGet the dates of the week of Monday and Sunday/// <summary>         ///Calculate Week 1st of week/// </summary>         /// <returns></returns>          Public StaticDateTime getmondaydate () {returngetmondaydate (DateTime.Now); }        /// <summary>         ///calculate dates for this week Sunday/// </summary>         /// <returns></returns>          Public StaticDateTime getsundaydate () {returngetsundaydate (DateTime.Now); }        /// <summary>         ///calculates the date from which a date is started (Day of the week)/// </summary>         /// <param name= "Somedate" >any day of the week</param>         /// <returns>returns the day of the week, followed by the exact time, minute, second, and incoming values equal</returns>          Public Staticdatetime getmondaydate (datetime somedate) {inti = Somedate.dayofweek-Dayofweek.monday; if(i = =-1) i =6;//The I value > = 0, because the enumeration reason, Sunday ranked in the front, at this time sunday-monday=-1, must +7=6. TimeSpan ts =NewTimeSpan (I,0,0,0); returnsomedate.subtract (TS); }        /// <summary>         ///calculates the end date of a day (day of worship)/// </summary>         /// <param name= "Somedate" >any day of the week</param>         /// <returns>returns the day of the week, followed by the exact time, minute, second, and incoming values equal</returns>          Public Staticdatetime getsundaydate (datetime somedate) {inti = Somedate.dayofweek-DayOfWeek.Sunday; if(I! =0) i =7I//for enumeration reasons, the Sunday is ranked first, minus the interval of 7. TimeSpan ts =NewTimeSpan (I,0,0,0); returnsomedate.add (TS); }#endregion

Collection of other methods/////////////////////////////////////

DateTime dt = DateTime.Now;//Current TimeDateTime Startweek= dt. AddDays (1-Convert.ToInt32 (dt. Dayofweek.tostring ("D")));//this MondayDateTime Endweek = Startweek.adddays (6);//this SundayDateTime Startmonth= dt. AddDays (1-DT. Day);//Early this monthDateTime Endmonth = startmonth.addmonths (1). AddDays (-1);//Month End//DateTime endmonth = startmonth.adddays (dt. AddMonths (1)-DT).  DAYS-1); //Month EndDateTime Startquarter= dt. AddMonths (0-(dt. Month-1) %3). AddDays (1-DT. Day);//At the beginning of the quarterDateTime Endquarter = startquarter.addmonths (3). AddDays (-1);//At the end of the quarterDateTime startyear=NewDateTime (dt. Year,1,1);//early this yearDateTime endyear =NewDateTime (dt. Year, A, to);//End of year

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C # gets Date function classes for Monday and Sunday