Leading zero missing in TrezorExample?

[moon6969]

The example code in https://github.com/MelbourneDeveloper/Device.Net#example-code has a leading zero added to the buffer...

//Create the request buffer
var buffer = new byte[65];
buffer[0] = 0x00;
buffer[1] = 0x3f;
buffer[2] = 0x23;
buffer[3] = 0x23;

but the source code sample does not...

Device.Net/src/Usb.Net.UWP.Sample/TrezorExample.cs

Lines 85 to 89 in 417330e

	//Create a buffer with 3 bytes (initialize)
	var writeBuffer = new byte[64];
	writeBuffer[0] = 0x3f;
	writeBuffer[1] = 0x23;
	writeBuffer[2] = 0x23;

For my usb hid device on Windows 10, I needed to add the leading zero to get it working.
I'm new to USB development, so found this quite confusing - WriteAndReadAsync() just blocks and never returns.

[moon6969]

OK it's an extra byte for HID Report ID for HID transfers as discussed here...
https://melbournedeveloper.github.io/Device.Net/articles/HidTransfer.html

Might be worth a comment in TrezorExample.cs to nudge USB novices in the right direction?