Which access limitation is there in a class member declared "Protected Friend"?

Which are true about Extension methods?

Which features that are not supported in the System.TimeZone class does the System.TimeZoneInfo class provide?

The default number of threads per processor in the System.Threading.ThreadPool class under version 3.5 of the Framework is?

Which are true regarding System.Web.Mail and System.Net.Mail namespaces?

By which contract are the WS-Addressing action and reply action elements of the soap envelope controllable when Windows Communication Foundation is used?

Which one is a primary characteristic of System.Xml.XmlDataDocument?

Which operations can NOT be performed inside a catch block?

What does the OrElse operator do?

Which one can an interface NOT contain?

Which are valid mechanisms for adding an event handler for Public Event SomeEvent() on the class Sample?