C# 获取当前月份天数的三种方法总结（转）

原文连接

方法一： 

int days = System.Threading.Thread.CurrentThread.CurrentUICulture.Calendar.GetDaysInMonth(DateTime.Now.Year ,DateTime.Now.Month); 

方法二：

DateTime dtNow = DateTime.Today;

int days = dtNow .AddDays(1 – dtNow .Day).AddMonths(1).AddDays(-1).Day;

方法三：

DateTime dtNow = DateTime.Now;
int days = DateTime.DaysInMonth(dtNow.Year ,dtNow.Month);