使用多个搜索项查找两个列表的交集

Question

我有以下对象（以JSON格式显示）

 UserBatch1{
       User{ name: user1; jobtitle: admin; department: finance; location: building1; extn: 1234}
       User{ name: user2; jobtitle: techie; department: engineering; location: building2; extn: 4321}
       User{ name: user3; jobtitle:boss; department:management: location: building3; extn: 5555}
}
UserBatch2{
       User{ name: user1; jobtitle: admin; department: finance; location: buildlig1 extn: 1234}
       User{ name: user4; jobtitle: techie; department: manufacturing; location: building4; extn: 8888}
       User{ name: user5; jobtitle: admin; department: management; location: building1; extn: 7777}
}

对象包含在列表中，例如

List<User> UserBatch1;
List<User> UserBatch2;

如何使用C＃找到这些列表的交集，例如，name包含“user”AND jobtitle =“admin”。
另一个例子是department = finance AND jobtitle = admin AND location = building1 为了清晰起见，我简化了问题，但每个对象都有10个属性，我将有10个列表。任何属性组合都可以用作搜索条件。

Answer 1

var User = UserBatch1.FirstOfDefault(i => i.department == "finance" && i.jobtitle = "admin");