C#•7mo ago

✅ How does an indexer work and why is it important?

Hello, was just reading a bit about indexers. From what I've understood, an indexer allows our class to behave like an array.

My questions are:

C#
public T this[int i]
{
    get => arr[i];
    set => arr[i] = value;
}

C#
public T this[int i]
{
    get => arr[i];
    set => arr[i] = value;
}

C#
public T this[int i]
{
    get => arr[i];
    set => arr[i] = value;
}

C#
public T this[int i]
{
    get => arr[i];
    set => arr[i] = value;
}

In order to use an indexer, we must always have one of the attribute declared as a 1D array?
Why are indexers important and helpful