Bin folder is not included in the project?

Hi,
I am working on my company's website and when I get the project from the Source safe and compile it. It compiles and run's fine.
But how come the Bin folder is not included in the project and how come my application is still running fine.?
Don't the BIN folder needs to be included my doing the right click on the BIN folder and including it in the project.?
thanks.

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