Vector3dCollectionItem Property

public virtual Vector3d this[
        int index
] { get; set; }

Public Overridable Default Property Item ( 
        index As Integer
) As Vector3d
        Get
        Set

public:
virtual property Vector3d default[int index] {
        Vector3d get (int index);
        void set (int index, Vector3d value);
}

abstract Item : Vector3d with get, set
override Item : Vector3d with get, set