The LINQ-to-DASL provider of the Office Interop API Extensions provides a very limited set of mappings between its query types and their associated DASL properties.  We didn't have the time to add them all and we didn't know which properties (besides...

When your LINQ-to-DASL queries do not return the results you expect, how do you determine where the problem is?  The issue could be that the query simply doesn't do what you expect.  For example, you could be querying the wrong DASL properties...