I assume that in the “Bin” folder you mean the build place where Visual Studio builds the executable version of your application.
As a rule, I found that making manual changes to the Bin folder is a good way to face the “new world of pain”. My problems were gone as soon as I started letting Visual Studio do what he wanted with the directory, and I left it alone.
If you have DLL links that link to your project, mark them as “Copy local” (select them in the solution explorer, configure them in the “Properties” panel), and Visual Studio will provide them for you to copy.
Note: since the Bin directory is managed by Visual Studio and is fully playable, I suggest that it (and it was not a member of Obj) not be under source control.
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