Use .NET to connect to SAP without creating PROXY.

[Tee]

Is that possible to write a ASP.NET code to connect to SAP without creating a SAP Proxy from SAP.NET connector? I found that a old VBSCRIPT can create a connection, link direct to SAP server, and retrieve data from RFC. But i found nothing by only SAP.NET connector to connect to SAP when using .NET framework. The reason because we found some difficulties when creating a proxy since the SAP server is quite old version. Please help