c# .net framework 4.7.2 make call to sip

[Desync3]

c# .net framework 4.7.2 make call to sip doesnt work. I get error and theres no example codes as i see it and I'm not able to compile the project without error so I'm just using nuget manager.

This my code:
` var sipTransport = new SIPUDPChannel();
var sipAccount = new SIPAccount(sipUser, sipServer, sipUser, sipPassword);
var sipCall = new SIPClient(sipTransport);

    var callRequest = sipCall.Call(unescape(sipUser), unescape(destination), unescape(callid), sipAccount, null);

    if (callRequest == null)
    {
        Console.WriteLine("Call failed.");
    }
    else
    {
        Console.WriteLine("Call successful.");
    }

`
But as i see it i get
The type or namespace name 'SIPAccount' could not be found
and much more errors and yes I'm using latest verison SIPSorcery.SIP;

[Desync3]

still need help