How to reference the Application object from another project in the same solution?

I have a solution containing two projects: a windows phone project and an authentication library.

In the authentication library I want to reference the开发者_运维问答 phone project's App.xaml.cs in code. Is this even possible?

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The right thing to do is to move the code that you want to use in both libraries to a separate assembly and reference this assembly from both of your projects.