Class Library using keyword

Question

Hi everybody. I have this problem that is puzzling me and I am unable to solve it at all. I have two files and they are: ClLib1 ClassLibraryApp1 As the name suggests, the "ClLib1" holds the DLL file, whereas the "ClassLibraryApp1" is a Windows Application used to test the DLL file. And so, I have a few .cs file in ClLib1 namely bye2009.cs and hello2010.cs. These two files are located under a file called Year.cs. While I was trying to put in "using ClLib1;" in ClassLibraryApp1 (whereby I've already added the reference from the ClLib's bin folder), I realise I am unable to put "using ClLib1.bye2009". How do I go about solving this?