I was passing today from NETMF to TINYCLR OS my Solution, but when I read this on the site I stopped:
Supporting built-in Ethernet or the use of SPI-based ENC28J60 require TinyCLR to host is own TCP/IP and TLS stacks. This is currently still in development. Another option is to use a C# TCP/IP implementation, such us mIP. Or use a chip with built in TCP/IP, like Wiznet W5500.
Does builtin ethernet works on the G400 Sodimm or is under development?