What is the linq equivalent to the SQL IN operator

Question

With linq I have to check if a value of a row is present in an array.
The equivalent of the sql query:

WHERE ID IN (2,3,4,5) 

How can I do it?

Answer 1

.Contains

var resultset = from x in collection where new[] {2,3,4,5}.Contains(x) select x 

Of course, with your simple problem, you could have something like:

var resultset = from x in collection where x >= 2 && x <= 5 select x 

Answer 2

Perform the equivalent of an SQL IN with IEnumerable.Contains().

var idlist = new int[] { 2, 3, 4, 5 };  var result = from x in source           where idlist.Contains(x.Id)           select x;