How to read from phoenix plc in c#

Hi i'm having big problem, i want to write application in c# something for HMI.
But i don't have any idea how to read i/o state from plc.
I'm using phoenix ILC130 via ethernet (interbus). For Siemens i found open drivers etc..

Any advices ? Money is a major problem. So I assume that I do not have them.

Any freeware opc server maybe ?

Using the C# code from Microsoft and the open IP_CONNECT IP_USEND blocks from Phoenix, if you're an experienced C# programmer it should be fairly easy to come up with an ethernet packet solution.

Alternatively, Phoenix does offer a function block that allows the ILC 130 ETH to act as a Modbus server (this is free). You could utilize this, and any of the free Modbus .NET clients to communicate via that method.