What is the output of a lambda expression?

Question

C++ / C#

static int FindZachetka(List<ExamPass> spisok, string zachetka)
        {
            spisok.FindIndex(s => s.zachetka == zachetka)
                {
 ????
                }
         
        };

I can't figure out what to write here. Otherwise, everything is underlined. Or is there some other way to do it?

Answer 1

The correct place for the error is something like this:
In general, it would be better to do something like this:

static ExamPass FindZachetka(List<ExamPass> spisok, string zachetka)
{
    return spisok.Find(s => s.zachetka == zachetka);
}

Answer 2

I don’t understand why the second curly braces, the labda is looking for the occurrence of the offset in the collection, I suppose the value should be assigned, but this is not accurate :) , as far as I can tell, it returns only the index, without further processing.

Answer 3

1. May underline because he wants to be assigned to a variable.
2. No usingusing System.Collections.Generic