Массив в C#

public class Test
{
    /// <summary>
    /// String array field instance.
    /// </summary>
    string[] _elements = { "one", "two", "three" };
 
    /// <summary>
    /// String array property getter.
    /// </summary>
    public string[] Elements
    {
	get { return _elements; }
    }
 
    /// <summary>
    /// String array indexer.
    /// </summary>
    public string this[int index]
    {
	get { return _elements[ index] ; }
    }
}

public string this[int index]
    {
        get { return _elements[ index] ; }
    }