C#中比较两个日期大小的方法

public bool IsBookBeOverdue(DateTime _beTime)
{
bool resultFlg = false;
int compNum = DateTime.Compare(DateTime.Now, _beTime);

//t1> t2
if (compNum > 0)
{
resultFlg = true;
}
else if (compNum == 0)
{
//相等
}
else
{
//DateTime.Now< _beTime
}
return resultFlg;
}