Linq And SQL Metadata Built In Functions?

So I wanted to check when last a table was changed, and I basically came up with this query:

SELECT DB_name(database_id) as [Database],OBJECT_NAME(object_id ,database_id) AS DatabaseName, last_user_update
FROM sys.dm_db_index_usage_stats
where DB_name(database_id) = 'Database Name'

Now what I want to do is put this in my code using LINQ. I have added the view to my datacontext and all that good stuff, but I don't really know how to do the SQL built in functions DB_Name and OBJECT_Name. I realise that I could do some sort of join to get the values for the id's instead, but I don't know which views I can find the database name and object name in.

Is there a linq equivalent to these functions? Alternatively, what are the system tables/views I need to look at to convert these ID's into their respective names?