DateTime

获取中文的周几

http://stackoverflow.com/questions/6182402/c-sharp-cultures-localize-dayofweek

private readonly CultureInfo cultureInfo = new CultureInfo( "zh-CN" );

DateTime dateTimeNow = DateTime.Now;
barStaticItem1.Caption = $@"{dateTimeNow:yyyy-MM-dd HH:mm:ss} {cultureInfo.DateTimeFormat.GetDayName(dateTimeNow.DayOfWeek)}";