public void UAGroup() { OpcClient client = new OpcClient(new Uri("opc.tcp://127.0.0.1:26543/Workstation.RobotServer")); if (client.Connect == OpcStatus.Connected) { string msg; OpcGroup group = client.AddGroup("Test"); client.AddItems("Test", new string[] { "Robot1.Axis1", "Robot1.Axis2" }, out msg); group.DataChange += Group_DataChange; Console.WriteLine(group); } }