LibUsbDotNet, no libusb-1.0.dll

Question

I'm attempting to port some C source (Linux) using libusb to C# (Windows). I successfully installed LibUsbDotNet on Windows 7. Then I proceeded to add using MonoLibUsb, since it looks like the easiest path for porting. However, when running there's an exception saying that libusb-1.0.dll is missing. And indeed, I can't seem to find it in C:\Windows\System32. So, two questions

1. Where can I find it? Searching online hasn't revealed any handy installer packages.
2. Why isn't it installed as part of LibUsbDotNet? AFAICS the lack of it makes half of LibUsbDotNet unusable.

Answer 1

Stumbled under the same issue one year after your post while compiling a C# program using the LibUsbDotNet library:

PS C:\src\FaultMonitor\FaultMonitor\bin\Debug> .\FaultMonitor.exe -u
An error occured while executing the proxy:
libusb-1.0.dll not found. If this is a 64bit operating system, ensure that the 6
4bit version of libusb-1.0.dll exists in the '\Windows\System32' directory.
at MonoLibUsb.MonoUsbSessionHandle..ctor()

For anyone in a similar predicament, download the libusb library and extract the contents (you will need 7zip). Within the extracted contents, copy the \MS32\dll\libusb-1.0.dll into your C:\windows\SysWOW64\ folder and copy the \MS64\dll\libusb-1.0.dll into your C:\windows\System32\. Afterwards, the program ran no problem:

PS C:\src\FaultMonitor\FaultMonitor\bin\Debug> .\FaultMonitor.exe -u
[15-10-23.02:09:05][+] Device: VendorID: 4203, ProductID: 63, Address: 1
[15-10-23.02:09:05][+] Device: VendorID: -32530, ProductID: 33, Address: 2