Opc.Ua.Com.Server.ComAeUtils.BrowseSuperTypes C# (CSharp) Method

        public static ReferenceDescriptionCollection BrowseSuperTypes(Session session, NodeId typeId, bool throwOnError)
        {
            ReferenceDescriptionCollection supertypes = new ReferenceDescriptionCollection();

            try
            {
                // find all of the children of the field.
                BrowseDescription nodeToBrowse = new BrowseDescription();

                nodeToBrowse.NodeId = typeId;
                nodeToBrowse.BrowseDirection = BrowseDirection.Inverse;
                nodeToBrowse.ReferenceTypeId = ReferenceTypeIds.HasSubtype;
                nodeToBrowse.IncludeSubtypes = false; // more efficient to use IncludeSubtypes=False when possible.
                nodeToBrowse.NodeClassMask = 0; // the HasSubtype reference already restricts the targets to Types. 
                nodeToBrowse.ResultMask = (uint)BrowseResultMask.All;

                ReferenceDescriptionCollection references = Browse(session, nodeToBrowse, throwOnError);

                while (references != null && references.Count > 0)
                {
                    // should never be more than one supertype.
                    supertypes.Add(references[0]);

                    // only follow references within this server.
                    if (references[0].NodeId.IsAbsolute)
                    {
                        break;
                    }

                    // get the references for the next level up.
                    nodeToBrowse.NodeId = (NodeId)references[0].NodeId;
                    references = Browse(session, nodeToBrowse, throwOnError);
                }

                // return complete list.
                return supertypes;
            }
            catch (Exception exception)
            {
                if (throwOnError)
                {
                    throw new ServiceResultException(exception, StatusCodes.BadUnexpectedError);
                }

                return null;
            }
        }