I got one customer who wanted to find all the installed Windows Store App using WPF platform. However, you cannot code in WPF because the current SDK for querying such information only supports UWP, not WPF.
After some research, there is one PowerShell script
Get-AppxPackage -AllUsers which will return all the installed Windows Store apps under all the user accounts in that PC.
So what we will show here is how to use .NET library to call PowerShell scripts.