Could not load file or assembly

I'm trying to create libraries here for use within another application. One of my libraries uses a common library, which I developed, and is added into the project references in my other library.

I've copied both dll's to the application folder but when I try to execute the function, I get an except that it is unable to find file or assembly relating to my common library.

My common library is referenced from this other library of mine so I know that this library is loading fine but cannot find the common library.

looking more in depth it seems like a versioning issue. How can I resolve these versioning issues as my common library may have newer versions but want my other libraries to use the assembly regardless of the common library version

any ideas?

Add the directory where you've dropped the common file(s) to your references path, under your projects properties.