public IEnumerable<UANodeElement> GetTags()
        {
            List<UANodeElement> tags = new List<UANodeElement>();
            UANodeElementCollection nodeElementCollection = new UANodeElementCollection();
            try
            {
                nodeElementCollection = client.BrowseDataVariables(endpointDescriptor, "nsu = KEPServerEX ; ns = 2; s = Channel1.Device2");
            }
            catch (UAException uaException)
            {
                Console.WriteLine("*** Failure: {0}", uaException.GetBaseException().Message);
            }
 
            // Display results
            foreach (UANodeElement nodeElement in nodeElementCollection)
            {
                Console.WriteLine();
                Console.WriteLine("nodeElement.NodeId: {0}", nodeElement.NodeId);
                Console.WriteLine("nodeElement.DisplayName: {0}", nodeElement.DisplayName);
                tags.Add(nodeElement);
            }
 
            return tags;
        }