title: how can I check and kill another instance of my application?
body: <p>I face to a problem that my customer is already running the application appA. Then they go to desktop (not kill the appA), and upgrade the application with the version up by run appA.ps1 with PowerShell. After that, click on appA after installed -> <code>get an exception</code>. I guess the root cause is that have another instance is running.</p>
  
  <p><strong>My question is how can I check my application is already running? Can I kill it?</strong></p>
  
  <p>Additional, my application is windows 8 store, c#.</p>