Error de cambio de fecha
DateTime.ParseExact(myDateString, "yyyyMMdd", CultureInfo.InvariantCulture, DateTimeStyles.None);
MOHAMMED EL HMAM
DateTime.ParseExact(myDateString, "yyyyMMdd", CultureInfo.InvariantCulture, DateTimeStyles.None);
DateTime.ParseExact(myDateString, "yyyyMMdd", CultureInfo.InvariantCulture, DateTimeStyles.None);
DateTime.ParseExact(myDateString, "yyyyMMdd", CultureInfo.InvariantCulture, DateTimeStyles.None);