How to find if an element of a list is in another list?

Question

I want to know if at least one element in a first list can be found in a second list.

I can see two ways to do it. Let\'s say our lists are:

List<         


        

Answer 1

The accepted answer is great, however it does not work with Linq-to-sql, since there's no mapping for Intersect. In that case you should use :

bool isFound = table.Any(row => list2.Contains(row.FieldWithValue));

This gets compiled to WHERE EXSITS