我已经来检测，如果两个时间段是重叠的。

I've to detect if two time periods are overlapping.

每一个时期都有一个开始日期和结束日期。

Every period has a start date and an end date.

我需要检测，如果我的第一时段（A）与另一个（B / C）重叠。

I need to detect if my first time period (A) is overlapping with another one(B/C).

在我的情况下，如果B的开始等于A的结束，他们不重叠（逆太）

In my case, if the start of B is equal to the end of A, they are not overlapping(the inverse too)

我发现了以下情况：

所以，其实我这样做是这样的：

So actually I'm doing this like this:

tStartA < tStartB && tStartB < tEndA //For case 1
OR
tStartA < tEndB && tEndB <= tEndA //For case 2
OR
tStartB < tStartA  && tEndB > tEndA //For case 3

（该壳体4被取入帐户而在壳体1或情况2）

(The case 4 is taken in account either in case 1 or in case 2)

据工作，但它似乎不是很有效。

It works, but it seems not very efficient.

因此​​，首先是有一个现有的类在C＃中，可以modelize这个（时间），有点像timepsan，但有一个固定的起始日期。

So, first is there an existing class in c# that can modelize this(a time period), something like a timepsan, but with a fixed start date.

二：有没有已经交流＃code（如在DateTime类），它可以处理这个

Secondly: Is there already a c# code(like in the Datetime class) which can handle this?

第三：？如果没有，这将是你的方法，使这种比较最快速的

Third: if no, what would be your approach to make this comparison the most fast?

推荐答案

简单的检查，看看两个时间段重叠的：

Simple check to see if two time periods overlap:

bool overlap = a.start < b.end && b.start < a.end;

，或在code：

or in your code:

bool overlap = tStartA < tEndB && tStartB < tEndA;

（使用＆LT; = 而不是＆LT; 如果您改变了主意，想要说，两个时期只是互相接触重叠。）

(Use <= instead of < if you change your mind about wanting to say that two periods that just touch each other overlap.)