c# - Retrieval of items from custom collection

Question

I have a following class

public class People
{
    public int id;
    public string nameHash;
    public string name;
}

I need to create a custom collection, consisting of objects of class People, that lets me retrieve elements by its id and nameHash. The collection must have the ability to iterate through its elements using foreach:

foreach (People person in PeopleCollection) { ... }

How do I do that? If you can not give a detailed answer, at least give a brief plan of action. Thanks in advance!

Answer 1

Is there a specific reason why it has to be a custom collection? Why not

List<People> PeopleCollection = new List<People>();

you can retrieve elements using id and nameHash and you can iterate over PeopleCollection