c# example for simple WPD/PTP/MTP image aquisition

Question

I want to build a super simple software which just downloads an image from a digital camera when it is taken (tethering).

As far as I understand I can use Windows Portable Devices (WPD) with the picture/media transfer protocol (PTP/MTP) to aquire the images.

I found examples how to get started with WPD here:

• https://github.com/geersch/WPD

There are just a few more questions:

• WPD even enumerates external hdds - how do I know if a device is a camera?
• How do I get notified if another camera is connected?
• How can I get notified when the camera takes a picture?