code:

class Widget
{
    private int32 id;
    protected Rect pos;
    public uint32 color;
}

class Button : Widget
{
    /* This class can access 'pos' and 'color' but not 'id' */
}


static void Main()
{
    var button = new Button();
    /* We can only access 'button.color' */

    /* The [Friend] attribute allows us to access members which are normally hidden */
    int32 id = button.[Friend]id;
    /* Note that the 'friend' relationship is inverted from C++ here - the user is 
    promising to be friendly rather than the defining types declaring its friends */
}