Having trouble getting code to work together in different projects

I have 2 project files. One called Business and another that is my Website project in visual studio 2010. I am trying to put a class called "AccountManager" inside the business project, and whenever something is done to the website it will go to the AccountManager and, for example, create an account using "CreateAccount(string, string, string)". I am having trouble linking these together. I keep getting errors saying

constructors does not contain a constr开发者_如何学Pythonuctor that takes '0' argument

and also

'Business.AccountManager' does not contain a definition for 'CreateAccount' and no extension method 'CreateAccount' accepting a first argument of type 'Business.AccountManager' could be found (are you missing a using directive or an assembly reference?)

Im not exactly sure if im missing an import somewhere? or a reference?

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Make sure you are marking your constructor as public and your methods as public...