So there are several ways to handle this. Since this is a baked in feature of of Windows 2008 R2 it will not show in add remove programs. On my cores I have mscorsvw.exe in SLM as to be scanned. So you can report on this using the inventory
You can also add these as monitored products unders SLM.
Another way is to modify the ldapp to include the registry keys for .Net http://stackoverflow.com/questions/199080/how-to-detect-what-net-framework-versions-and-service-packs-are-installed and you can use http://community.landesk.com/support/docs/DOC-3064
Thank you for that info, I was able to create a Custom Data entry in the ldappl3.template file and get it out to the fleet.