generic list class in c#

Question

I'm currently making my own very basic generic list class (to get a better understanding on how the predefined ones work). Only problem I have is that I can't reach the elements inside the array as you normally do in say using " System.Collections.Generic.List ".

GenericList<type> list = new GenericList<type>();
list.Add(whatever);

This works fine, but when trying to access "whatever" I want to be able to write :

list[0];

But that obviously doesn't work since I'm clearly missing something in the code, what is it I need to add to my otherwise fully working generic class ?

Answer 1

It's called an indexer , written like so:

public T this[int i]
{
    get
    {
        return array[i];
    }
    set
    {
        array[i] = value;
    }
}

Answer 2

I think all you need to do is implement IList<T> , to get all the basic functionality

  public interface IList<T>  
  {

    int IndexOf(T item);

    void Insert(int index, T item);

    void RemoveAt(int index);

    T this[int index] { get; set; }
  }