A simple indexer

suggest change

class Foo
{
    private string[] cities = new[] { "Paris", "London", "Berlin" };

    public string this[int index]
    {
        get {
            return cities[index];
        }
        set {
            cities[index] = value;
        }
    }
}

Usage:

var foo = new Foo();

// access a value    
string berlin = foo[2];

// assign a value
foo[0] = "Rome";

View Demo

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