添加两个日期后您会得到什么?
3月3日+下星期二等于多少?我不知道，我也不认为你知道.因为很傻.就像在光年中添加橘子一样！

考虑一下:您实际上要实现什么?

What do you expect to get when you add two dates?
What is 3rd March + next Tuesday equal to? I don''t know, and I don''t think you do. Because it is silly. It is like adding oranges to lightyears!

Think about it: what are you actually trying to achieve?

您使用^ ]和 TimeSpan [

You use DateTime[^] and TimeSpan[^] structs

But you cannot add a DateTime to another DateTime. You can add a TimeSpan to a DateTime.

DateTime now = DateTime.Now;
DateTime arrive = now + new TimeSpan(2, 30, 0); // Add 2 hours and 30 min.

将add key="DateTime"更改为TimeSpan.

Change add key="DateTime" to TimeSpan.

按照此处 [^ ] .
然后使用DateTime.Add方法将此值添加到另一个日期.

Read this date as described here[^].
Then add this value to another date using the DateTime.Add method.