Opc.Ua.Client.Session.FindDataDictionary C# (CSharp) Method

        public DataDictionary FindDataDictionary(NodeId descriptionId)
        {
            // check if the dictionary has already been loaded.
            foreach (DataDictionary dictionary in m_dictionaries.Values)
            {
                if (dictionary.Contains(descriptionId))
                {
                    return dictionary;
                }
            }
            
            // find the dictionary for the description.
            Browser browser = new Browser(this);

            browser.BrowseDirection = BrowseDirection.Inverse;
            browser.ReferenceTypeId = ReferenceTypeIds.HasComponent;
            browser.IncludeSubtypes = false;
            browser.NodeClassMask   = 0;

            ReferenceDescriptionCollection references = browser.Browse(descriptionId);
            
            if (references.Count == 0)
            {
                throw ServiceResultException.Create(StatusCodes.BadNodeIdInvalid, "Description does not refer to a valid data dictionary.");
            }
            
            // load the dictionary.
            NodeId dictionaryId = ExpandedNodeId.ToNodeId(references[0].NodeId, m_namespaceUris);

            DataDictionary dictionaryToLoad = new DataDictionary(this);

            dictionaryToLoad.Load(references[0]);

            m_dictionaries[dictionaryId] = dictionaryToLoad;

            return dictionaryToLoad;
        }