I have just added the sunfounder W5100 ethernet shield to my project, and have added the required libraries.

#include <SPI.h>
#include <Ethernet.h> 

When i try to build my sketch i get the following output the build

Compiling 'Sketch1' for 'Arduino/Genuino Mega w/ ATmega2560 (Mega 2560)'

ccOXjFhm.ltrans0.ltrans.o*: In function EthernetUDP::peek()
ccOXjFhm.ltrans0.o*: (.text+0x282): undefined reference to peek(unsigned char, unsigned char*)

ccOXjFhm.ltrans0.ltrans.o*: In function EthernetClient::peek()
ccOXjFhm.ltrans0.o*: (.text+0x2c4): undefined reference to peek(unsigned char, unsigned char*)


Error linking for board Arduino/Genuino Mega w/ ATmega2560 (Mega 2560)
ccOXjFhm.ltrans0.ltrans.o*: In function EthernetUDP::read(unsigned char*, unsigned int)
ccOXjFhm.ltrans0.o*: (.text+0x300): undefined reference to recv(unsigned char, unsigned char*, int)

ccOXjFhm.ltrans0.ltrans.o*: In function EthernetUDP::read()
ccOXjFhm.ltrans0.o*: (.text+0x342): undefined reference to recv(unsigned char, unsigned char*, int)

ccOXjFhm.ltrans0.ltrans.o*: In function EthernetClient::read(unsigned char*, unsigned int)
ccOXjFhm.ltrans0.o*: (.text+0x372): undefined reference to recv(unsigned char, unsigned char*, int)

ccOXjFhm.ltrans0.ltrans.o*: In function EthernetClient::read()
ccOXjFhm.ltrans0.o*: (.text+0x38e): undefined reference to recv(unsigned char, unsigned char*, int)

ccOXjFhm.ltrans0.ltrans.o*: In function EthernetClient::available()
ccOXjFhm.ltrans0.o*: (.text+0x3b2): undefined reference to recvAvailable(unsigned char)

ccOXjFhm.ltrans0.ltrans.o*: In function EthernetUDP::parsePacket()
ccOXjFhm.ltrans0.o*: (.text+0x3f4): undefined reference to recvAvailable(unsigned char)
ccOXjFhm.ltrans0.o*: (.text+0x40e): undefined reference to recv(unsigned char, unsigned char*, int)

ccOXjFhm.ltrans0.ltrans.o*: In function EthernetUDP::write(unsigned char const*, unsigned int)
ccOXjFhm.ltrans0.o*: (.text+0x480): undefined reference to bufferData(unsigned char, unsigned int, unsigned char const*, unsigned int)

ccOXjFhm.ltrans0.ltrans.o*: In function EthernetUDP::endPacket()
ccOXjFhm.ltrans0.o*: (.text+0x49a): undefined reference to sendUDP(unsigned char)

ccOXjFhm.ltrans0.ltrans.o*: In function EthernetUDP::beginPacket(IPAddress, unsigned int)
ccOXjFhm.ltrans0.o*: (.text+0x4aa): undefined reference to startUDP(unsigned char, unsigned char*, unsigned int)

ccOXjFhm.ltrans0.ltrans.o*: In function EthernetUDP::stop()
ccOXjFhm.ltrans0.o*: (.text+0x4ba): undefined reference to close(unsigned char)

ccOXjFhm.ltrans0.ltrans.o*: In function EthernetUDP::begin(unsigned int)
ccOXjFhm.ltrans0.o*: (.text+0x4f6): undefined reference to socketStatus(unsigned char)
ccOXjFhm.ltrans0.o*: (.text+0x520): undefined reference to socket(unsigned char, unsigned char, unsigned int, unsigned char)

ccOXjFhm.ltrans0.ltrans.o*: In function EthernetClient::flush()
ccOXjFhm.ltrans0.o*: (.text+0x536): undefined reference to flush(unsigned char)

ccOXjFhm.ltrans0.ltrans.o*: In function EthernetClient::write(unsigned char const*, unsigned int)
ccOXjFhm.ltrans0.o*: (.text+0x560): undefined reference to send(unsigned char, unsigned char const*, unsigned int)

ccOXjFhm.ltrans0.ltrans.o*: In function EthernetUDP::beginMulticast(IPAddress, unsigned int)
ccOXjFhm.ltrans0.o*: (.text+0x100a): undefined reference to socket(unsigned char, unsigned char, unsigned int, unsigned char)
ccOXjFhm.ltrans0.o*: (.text+0x1042): undefined reference to socketStatus(unsigned char)
ccOXjFhm.ltrans0.o*: (.text+0x10b4): undefined reference to socket(unsigned char, unsigned char, unsigned int, unsigned char)
ccOXjFhm.ltrans0.o*: (.text+0x10ba): undefined reference to listen(unsigned char)

ccOXjFhm.ltrans0.ltrans.o*: In function EthernetServer::begin()
ccOXjFhm.ltrans0.o*: (.text+0x115e): undefined reference to disconnect(unsigned char)

ccOXjFhm.ltrans0.ltrans.o*: In function EthernetClient::connected()
ccOXjFhm.ltrans0.o*: (.text+0x1198): undefined reference to close(unsigned char)

ccOXjFhm.ltrans0.ltrans.o*: In function EthernetServer::write(unsigned char const*, unsigned int)
ccOXjFhm.ltrans0.o*: (.text+0x13a8): undefined reference to socketStatus(unsigned char)
ccOXjFhm.ltrans0.o*: (.text+0x13ee): undefined reference to socket(unsigned char, unsigned char, unsigned int, unsigned char)
ccOXjFhm.ltrans0.o*: (.text+0x13fc): undefined reference to connect(unsigned char, unsigned char*, unsigned int)

collect2.exe*: error: ld returned 1 exit status
Build failed for project 'Sketch1' 

This will not build or run.
No other code was added to project.

I have also tried the same code in the Arduino IDE and it builds just fine and runs.
I'm at a loss and looking for any suggestions.

Visual Studio Version: 15.7.5
vMirco Version: 1807.8.0
Arduino IDE version:1.8.5
Under manage Libraries I do see Ethernet 2.0.0 by various listed

I am still receiving this error.
I thought I had it beat, but alas it has come back.
I have email the files you requested but have not heard anything back as of yet. Any info you can provide would be quite helpful.
Thank you