Detect Active RDP Session

Question

I need to implement a dead man's switch in my application. If the application is running from RDP, I need to act if it loses connection to the remote client.

I know when I am running in RDP by using

GetSystemMetrics(SystemMetric.SM_REMOTESESSION)

But when the client closes without signing out, the session will continue. This is the scenario I want to react to, but I don't know how to detect a client disconnecting. I need to know if there is an active RDP user or not.

I could potentially find the remote endpoint by watching the RDP port, but as think could potentially be setup on a non-default port, I'd like to avoid this solution if a better one exists.

I'd prefer a solution that was not specific to WinForms, WPF, UWP etc. Bonus points if it works with .NET Core as well.

Answer 1

1. Yes you can do it using PS e.g. using > query user /server:$SERVER
2. Any PS command you can call from .Net.

Regards Ren