Add .NET 3.5 Framework to local SXS (i.e. make 'Available' not 'installed')

Hi All, 

I'd like to build a VM template that will be used to deploy many new VMs that will not have any network access. Some of these VMs will need the .NET Framework 3.5 installed, some won't.

By default in Windows Server 2012 (we're using 2012 R2 U1), running the Get-WindowsFeature command shows 'NET-Framework-Core' with status 'removed'. Is it possible to add this feature to the local SxS store so that it has a status of 'available'? This is so that our deployment script can install the framework using its local store rather than an 'alternate location'

Thanks!

Thanks Christoph