c# mongodb driver 插入重复记录

Update<T>.AddToSet(x => x.objects, new T(t))

Update<T>.Push(x => x.objects, new T(t))

http://stackoverflow.com/questions/27248556/mongodb-difference-between-push-addtoset

官方文档：
https://docs.mongodb.org/manual/reference/operator/update/push/
https://docs.mongodb.org/manual/reference/operator/update/addToSet/

c# mongodb driver 插入重复记录

原文：http://blog.csdn.net/lan_liang/article/details/50214897