How to intersect mutliple list with Lambda Expression?

Question

I have a few list. Their count isn't clear.

For example (for 4 list):

List1   List2    List3     List4 
-----   -----    -----     -----
  1       2        3         4
  2       4        8         3   
  3       8        4         5   
  4       11       6         1    
  5       3        7         7    
  6       9        11        9

I want to find the items that are common. It can do with T-SQL in MSSQL.

The result will be like that:

ResultList : (3, 4)

How is it done with Lambda Expression ?

Answer 1

You can use Enumerable.Intersect

var commonItems = list1.Intersect(list2).Intersect(list3).Intersect(list4);