[C#]如何 取得當月的最後一天(How do you get the last day of the month)

問題

---

如何 取得當月的最後一天



解決方法

---

///
/// 取得當月最後一天的日期
///
public string GetThisMonthLastDay(DateTime date)
{
    string LastDay = string.Empty;
    LastDay = Convert.ToString(new DateTime(date.Year, date.Month, 1).AddMonths(1).AddDays(-1).Year).PadLeft(2, '0') + "/"
        + Convert.ToString(new DateTime(date.Year, date.Month, 1).AddMonths(1).AddDays(-1).Month).PadLeft(2, '0') + "/"
        + Convert.ToString(new DateTime(date.Year, date.Month, 1).AddMonths(1).AddDays(-1).Day).PadLeft(2, '0');
    return LastDay;
}