I have a Windows store app I want to run (if not running) or expand (if not expanded) of another of my app written in WPF.
Through The Process.Start() I could not do. Tell me, can this be done? Thanks for the help!
To launch an UWP app from another app, you could make use of deep linking.
Here is a great article describing exactly how to do that
In summary, you need to add a protocol declaration (essentially a URL with a custom scheme), handle the activation event and then you can launch that app by navigating to that URL from your other application.