Querying Active Directory with “SQL”?

// NOTE: Entity type definition "User" omitted in sample - see samples in release.

var users = new DirectorySource<User>(ROOT, SearchScope.Subtree);
users.Log = Console.Out;

var res = from usr in users
          where usr.FirstName.StartsWith("B") && usr.Office == "2525"
          select new { Name = usr.FirstName + " " + usr.LastName, usr.Office, usr.LogonCount };

foreach (var u in res)
{
    Console.WriteLine(u);
    u.Office = "5252";
    u.SetPassword(pwd);
}

users.Update();