I planed using a arduino Ethernet sheild 2 with the FEZ to acsess a LAN to read out values from a shared file. I can’t find anny libraies for this purpose in C#, just arduino and some in C++. Would you recomend to us a DLL or is it an easier way.
The data sheet for the W5500 states: . If you use W5500, you can
implement the Ethernet application just by adding the simple socket program.
But I have not found anny reference to this simple socket program.
Do you have the driver for that device? 
For the Arduino card, this is what is refered to,
https://www.arduino.cc/en/reference/ethernet
On the W5500 chip, this is the driver, but it is in C++. Would u recomend to import the libary as a DLL?
http://wizwiki.net/wiki/doku.php?id=products:w5500:driver
http://wizwiki.net/wiki/doku.php?id=products:w5500:application:tcp_function
I forgot to state that the plane is to use TCP IP over SPI. I tried “using TinyCLR.Networking” but the library where not found, even when imported as a Nu get pacakge. tinyCLR.Net where suggested from VS.
Your help is appriciated!
I hope one day this will be updated to use tinyclr and use the networking wrappers we have now available.