c# - 给定开始日期如何根据闰年找到有 365 或 366 天的结束日期

Question

public static DateTime GetBudgetYearEndDateConsideringLeapYear(DateTime budgetYearStartDate)
    {
        DateTime endDate = DateTime.MinValue;
        if (budgetYearStartDate == null)
            throw new ArgumentNullException("budgetYearStartDate must be provided before calling this method");

        int startingDateMonth = budgetYearStartDate.Month;
        if (startingDateMonth > 2) /// Leap year for the starting year is escaped because  Month is NOT February
        {
            endDate = budgetYearStartDate.AddDays(365);
            bool isEndYearLeapYear = DateTime.IsLeapYear(endDate.Year);

            if (isEndYearLeapYear)
            {
                return endDate.AddDays(1);
            }
            return endDate;
        }
        else  // started from JAN/ FEB
        {
            if (DateTime.IsLeapYear(budgetYearStartDate.Year))
            {
                return budgetYearStartDate.AddDays(366);
            }
            return budgetYearStartDate.AddDays(365);
        }

    }

我在这里错过了什么

Answer 1

有什么问题:

public static DateTime GetBudgetYearEndDateConsideringLeapYear
    (DateTime budgetYearStartDate)
{
    return budgetYearStartDate.AddYears(1);
}

?换句话说，返回从开始日期算起一年的日期，不管它是否是闰年。

有几点需要注意:

• 如果开始日期是 2 月 29 日，您应该考虑您想要的结果
• 鉴于 DateTime 是一个值类型
，您的无效检查毫无意义