Question

I have a list with multiple class that contain a Property that is an Integer (Id).

I have a List of Integer too.

Now, I would like to trim the List of my object to only those class that has the Property in the list of the integer.

Example:

List of MyObject [MyObjectA].Id = 1 [MyObjectB].Id = 2 [MyObjectC].Id = 3 [MyObjectD].Id = 4  List of Integer 1 2  Final list should be  [MyObjectA] [MyObjectB] 

How can I do it?

Answer 1

You could use contains:

var finalList = originalList.Where(x => idList.Contains(x.Id)).ToList(); 

Or a join:

var finalList = (from entry in originalList                 join id in idList on entry.Id equals id                 select entry).ToList();