List All Tags In OPCSERVER DA|OPC UA Standard|Forum|OPC Foundation

Good morning, I'm an engineering student in Brazil and I need to list all the tags on an OPCDA server, my teacher gave me DLLS that he uses and I've already been able to do the communication, but I can not list the tags that are on the server.
My code is as follows:

OpcCom.ServerEnumerator se = new OpcCom.ServerEnumerator();
Opc.Server[] servers = se.GetAvailableServers(Opc.Specification.COM_DA_20);
//Opc.Hda.Server daServer = (Opc.Hda.Server)servers[0];
Opc.Da.Server daServer = (Opc.Da.Server)servers[1];
daServer.Connect();

How can I list all the tags? I also saw that there is the group question, as I set up an opc server for Matrikon for testing and I used their opcview.