How to check if the external app is open or close using C#

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Hi i created a window service to check if my windows application is closed or open, my problem is how can i check if the application is already open or close the execute my code to open it again, i created this because someone is always closing my application it's not for an malicious intent.

What I have tried:

i already have a code for opening my application that i created using window service.

Posted 23-Jun-20 1:16am

Reden Rodriguez

Updated 23-Jun-20 1:30am

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F-ES Sitecore 23-Jun-20 7:32am

You not having malicious intent doesn't make it magically possible. Services don't really have access to the interactive user, if it started an app the user wouldn't see it as it is running in a different user session.

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Garth J Lancaster · Answer 1 · 2020-06-23T01:31:00

If you're talking about service & application 'on a single, local pc', then, if the application creates a unique mutex, the service can check if the mutex is already in use or not... already in-use means the application is running. When the application ends, by fair means or foul, it closes and disposes of the mutex ...

That is but one way - do a google search for C# Single Instance Application and you'll likely come up with some code - this for example Single instance C# application · GitHub[^]