OPC UA - How to reach OPC Server Nodes via C# |OPC UA Standard|Forum|OPC Foundation

I just tried that example and I get a result like

OPC UA Console Reference Client
OPC UA library: 1.4.370 @ 11/03/2022 08:49:12 -- 1.4.370
Connecting to... opc.tcp://10.0.254.195:49320/
BadCertificatePolicyCheckFailed 'SHA1 signed certificates are not trusted.'
Untrusted Certificate rejected. Subject = CN=KEPServerEX/UA Server, O=Unknown, C=US, DC=ISKIAATSRV
Create Session Error : SHA1 signed certificates are not trusted.
Could not connect to server! Retry in 10 seconds or Ctrl-C to quit.

I can connect with UA Reference/Reference Client but can't cannect with Console Reference Client. Please help thanks.

I am using KEPServerEX6, I can connect with Reference Client but can't connect with Console Reference Client.

Are there a simple browse tree and read a tag sample or any video about this?

Hi again, I found a simple sample on this; most people know this sample.

link: click

This is a console app and it gives tag values, I moved them to the windows form app. But there is a problem with that.

Here is a function call subscription.Create();

It gives tag values that are in the monitored item list per PublishingInterval time. When I run it on the windows form app it gives an error. Because the windows form app can't run it like a console app. How can we return these values like subscription.Create(); method. 

Any information you provide will be very useful for all of us, thanks.

On Console App

var subscription = new Subscription(session.DefaultSubscription) { PublishingInterval = 1000 };

Console.WriteLine("Step 5 - Add a list of items you wish to monitor to the subscription.");
var list = new List<MonitoredItem>();

MonitoredItem CikisDebi = new MonitoredItem(subscription.DefaultItem)
{
DisplayName = "Cikis Debi",
StartNodeId = "ns=2;s=AATSRV.AATSRV.@LOCALMACHINE::.List of all tags.B080Cikis_Debi"
};

MonitoredItem GirisSeviye = new MonitoredItem(subscription.DefaultItem)
{
DisplayName = "Giris Seviye",
StartNodeId = "ns=2;s=AATSRV.AATSRV.@LOCALMACHINE::.List of all tags.B080Giris_Seviye1"
};

list.Add(GirisSeviye);
list.Add(CikisDebi);

list.ForEach(i => i.Notification += OnNotification);
subscription.AddItems(list);

Console.WriteLine("Step 6 - Add the subscription to the session.");
session.AddSubscription(subscription);

subscription.Create();

Console.WriteLine("Press any key to remove subscription...");
Console.ReadKey(true);
}

There is no Console.WriteLine method but this subscription.Create(); method prints the values per { PublishingInterval = 1000 }; ms.

WinForms doesn't have a property for run this method. 

I mean how can we run it like subscription.Create();

picture example about subscription.Create(); how its running: 

Thanks for your replies.