Certificate WinForms in Net Core - by: Ureña

Hello, i have migrated a Winfomrs application from Net Framework to net Core 3.1 and i don't know how to accept the certificats, In a windows service i know a folder called opc foundation is created and i have to move the plc certificate from rejected certificates to the trusted folder, but in winforms when i run the application it didn't ask for the certificates then when I try to communicate with the plc I have the not trusted certificate error but the opc foundation folder doesn't appear.
How i have to manage the certificates in winforms?

Thanks

Edgar Ureña