C#: Check if current user is disconnected

Question

In C#, how to check programatically if the current user is in Windows 'Disconnected' state?

Background: On a server, I would like all instances of my program to selv-terminate if the current user is disconnected.

The program is not running in elevated state, i.e. not as administrator.

"Disconnected" as in not connected to RDP, or in the lock screen? — gunr2171, Aug 18 '21 at 15:06
Are you using .NET Core? Or .NET Framework? Or is this a class library and you're using .NET Standard? — mason, Aug 18 '21 at 15:08
Have a look at the [SystemEvents.SessionSwitch](https://learn.microsoft.com/en-us/dotnet/api/microsoft.win32.systemevents.sessionswitch?view=net-5.0) event if it fits your needs. — Steeeve, Aug 18 '21 at 15:26

score 1 · Answer 1 · answered Aug 18 '21 at 15:20

1

You will have to override WndProc to hook into the Windows System Messages. This will not be possible if you're in a console app.

answered Aug 18 '21 at 15:20

Victor Procure

Thank you @Victor, I was able to make it work. : ) I tried inserting a set of working code, but was not allowed. – Bjørn Sigurd Benestad Johansen Aug 18 '21 at 21:23

1 Answers1