C#Linq String [] list减去String []列表

Question

让我们说吧

string[] admins = "aron, mike, bob";
string[] users = "mike, katie, sarah";

如何从管理员那里获取用户并删除任何人.

结果应该是"katie,sarah"; (迈克被删除)

有没有一个很好的Linq方式来做到这一点？

Answer 1

// as you may know, this is the right method to declare arrays       
string[] admins = {"aron", "mike", "bob"};
string[] users = {"mike", "katie", "sarah"};

// use "Except"
var exceptAdmins = users.Except( admins );

Answer 2

users.Except(admins);

查看更多设置操作:

http://msdn.microsoft.com/en-us/vcsharp/aa336746.aspx

Answer 3

最简单的方法是使用IEnumerable<T>.Except:

var nonAdmins = users.Except(admins);