Deserialize a binary file in a separate project

I am trying to access & deserialize a serialized int variable(with stored value) saved in one project (with a save script), using a load script from another project.
The problem is with the class used to serialize the data as it cannot be accessed outside the first project, obviously. Can anyone help?
Using a new class and int variable to store deserialized data in load script is also not working.

@Zamorin, create separate class library project with serializable class, build it. make the .dll resource for another project and just put it in your unity project folder (it makes that .dll resource for your unity project)