HideFlags.HideInHierarchy

Description

The object will not appear in the hierarchy.

    // Creates 5 planes and hides them from the Hierarchy in the Editor.

    function Start() {
        for(var i : int = 0; i < 5; i++) {
            var createdGO : GameObject = GameObject.CreatePrimitive(PrimitiveType.Plane);
            createdGO.hideFlags = HideFlags.HideInHierarchy;
        }
    }

no example available in C#