Simple C++/CLI SerialPort ReadByte (at least, so I thought...) - c++

Question

So, I am working with C++/CLI in VisualStudio and an Arduino based board. My goal is to implement MODBUS via RS485.
So the setup I have for development is as follows...
Laptop connected Via FTDI USB-RS485 interface cable to Maxim MAX3485 chip which is connected to Arduino serial port "Serial1".
I have been writing my MODBUS protocol in Visual Studio and testing it out by asking the Arduino to respond with the contents of 5 registers (a 5 byte array).
Everything works except for some reason, return bytes are getting split in two when I check the result.
I.E... I'm sending the following bytes from the Arduino:
0 A 0 14 0 1E 0 28 0 32
A is actually "0A", but the terminal window only displays it as "A". The software on the computer receives the bytes, and stores them in an array. I then display the bytes received on the screen as text. What I get is:
0 A 0 1 4 0 1 E 0 2 8 0 3 2
Which looks correct, except the space between the "1 & 4", "2 & 8" etc.. which is telling me that I have 14 bytes instead of the 10 bytes the I sent out.
I'm displaying each byte on the screen separated by a space. I verified the bytes leaving are correctly formatted using a terminal window on a separate com port, so the problem must be in the reading of the bytes?
My Arduino code:
// Print to terminal window to verify bytes leaving
Serial.print("Sending:- ");
for (int x = 0; x < i_Index; x++) {
Serial.print(DataTxRegister[x], HEX);
Serial.print(" ");
}
Serial.println(" ");
// CONFIGURE 485 CHIP TO TX MODE
digitalWrite(CNTL_PIN, HIGH);
delay(5);
// TRANSMIT ALL DATA FROM TX REGISTER
for (int x = 0; x < i_Index; x++) {
Serial1.print(DataTxRegister[x], HEX);
}
i_Index = 0;
delay(5);
// CONFIGURE 485 CHIP BACK TO RX MODE
digitalWrite(CNTL_PIN, LOW);
Visual Studio code
Read Bytes....
int8_t Byte;
// DATA RECIEVED FROM ARDUINO / DEVICE USING MODBUS PROTOCOL
if(sender == this->serialPort1){
Msg.Message_Length = 0;
while (this->serialPort1->BytesToRead != 0) {
Byte = this->serialPort1->ReadByte;
if (Byte != -1) {
Msg.Incoming_Bytes[Msg.Message_Length++] = (Byte);
}
}
this->BeginInvoke(gcnew EventHandler(this, &Form1::DisplayMBRecieved));
}
Display Bytes...
this->textBox1->AppendText("\r\n");
this->textBox1->AppendText("Bytes Received: ");
this->textBox1->AppendText(Convert::ToInt32(Msg.Message_Length).ToString("X8") + " :- ");
for (unsigned int i = 0; i < Msg.Message_Length; i++) {
this->textBox1->AppendText(Convert::ToString(Convert::ToChar(Msg.Incoming_Bytes[i])));
this->textBox1->AppendText(" ");
}
Msg.Message_Length = 0;