Extracting a list from a list LINQ

Question

I am trying to extract a list of Goals from within a list of Students using this method

 public List<Goal> GetGoalsForTeacher(int userId)
        {
            var students = GetStudentsForTeacher(userId);
            var result = students.Select(e => e.Goals).ToList();
            return result

        }

However, I need it to return a List, but it is returning a List<IList>. Has anyone any idea on how I would convert this or make it a List initially?

I suspect that the `Goals` property of whatever class is use for 'student' is itself a `List` — ChrisBD, Aug 05 '21 at 15:22

score 1 · Accepted Answer · answered Aug 05 '21 at 15:22

1

You're looking for the SelectMany() method.

var result = students.SelectMany(e => e.Goals).ToList();

answered Aug 05 '21 at 15:22

StriplingWarrior

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woohoo it worked thank you! – culdaffe Aug 05 '21 at 15:23

Extracting a list from a list LINQ

1 Answers1