IGISServerConnection2 conn = new GISServerConnectionClass(); Conn.Connect(); Returns Class not registered error

[AmitabhaSarkar]

I am executing following code from VS 2019 from a ServerObjectExtension and getting error gisConnection.Connect().

            IGISServerConnection2 conn = new GISServerConnectionClass(); //GISServerConnection()

            conn.Connect2("arcgis","NTPCSRV01"); --- Returns error

            conn.Connect( "NTPCSRV01"); -- Returns error

Error Message - System.Runtime.InteropServices.COMException HResult=0x80040154 Message=Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG)) Source=ESRI.Server.Server

Even if I referenced ESRI.ArcGIS.Server then also I receive similar error.

[AmitabhaSarkar]

Yes, I can connect to ArcGIS Server 10.0 but not 10.8.1

[nicogis]

In fact 10.1 or superior doesn't use dcom

[AmitabhaSarkar]

Thanks for the confirmation, then what is alternative I need to access Server Object Manager and Create ServerContext. Many thanks in Advance.