I have tested SDK example TcpVideoViewer on Ubuntu16.04 using Mono.
run -time error message is :
Unhandled Exception:
System.NotImplementedException: The method or operation is not implemented.
at ServerCommandWrapper.Ntlm.NtlmConnection..ctor (System.String domain, ServerCommandWrapper.AuthenticationType authType, System.String username, System.String password, System.String hostname, System.Int32 port) [0x00160] in <3966857a51db48e4b44845c84ffb5f87>:0
at LoginDotNetSoap_CS.Program.Main (System.String[] args) [0x000ec] in <47dc2ec597fb41168e386f4e2554cbab>:0
[ERROR] FATAL UNHANDLED EXCEPTION: System.NotImplementedException: The method or operation is not implemented.
at ServerCommandWrapper.Ntlm.NtlmConnection..ctor (System.String domain, ServerCommandWrapper.AuthenticationType authType, System.String username, System.String password, System.String hostname, System.Int32 port) [0x00160] in <3966857a51db48e4b44845c84ffb5f87>:0
at LoginDotNetSoap_CS.Program.Main (System.String[] args) [0x000ec] in <47dc2ec597fb41168e386f4e2554cbab>:0
source code where the program run-time error as follows:
NtlmConnection.cs
Server.ClientCredentials.ServiceCertificate.SslCertificateAuthentication = new X509ServiceCertificateAuthentication()
{
CertificateValidationMode = X509CertificateValidationMode.None,
};