Extract list where string is contained inside a list inside the list

Question

Basically I have a list of objects. Let's call them meetings. Inside the meetings there is another list of objects. Let's call those participants. I want to return all meetings where a certain participant is in the list.

I want something like this:

meetings.Where(meeting => meeting.Participants.Name == "Test name").ToList();

Basically return a list of meetings, where the meeting has a participant with the name "Test name".

EDIT: I actually ended up using a MongoDB filter. Before I would just extract all the "meetings" (with a filter) and then use LINQ to filter the list. Might as well filter out the results on database level.. But this is good to know.

Answer 1

Are you looking for Any?

var result = meetings
  .Where(meeting => meeting
     .Participants
     .Any(participant => participant.Name == "Test name"))
  .ToList();

Answer 2

You can use LINQ method Any and this one line of code :

var result = meetings.Where(m => m.Participants.Any(p => p.Name == "Test name")).ToList();