Finding out installed Metro applications on a machine

Thanks everyone! For the PackageManager code to work, I had to do the following

1) Add the following to .csproj.

 <PropertyGroup>
   <TargetPlatformVersion>8.0</TargetPlatformVersion>
 </PropertyGroup>
 <Reference Include="System.Runtime, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"/>

2) Add a reference to C:\Program Files (x86)\Windows Kits\8.0\References\CommonConfiguration\Neutral\Windows.winmd

After doing the above, I was able to list all the metro packages.

I wish I could comment...Is this an option?

IEnumerable<Windows.ApplicationModel.Package> packages = 
        (IEnumerable<Windows.ApplicationModel.Package>)packageManager.FindPackagesForUser("");

http://msdn.microsoft.com/en-us/library/windows/apps/windows.management.deployment.packagemanager.aspx