Entity Framework Data Source for whole solution having multiple PRISM based projects

Question

My application is WPF(C#) based using Microsoft PRISM technology. As per PRISM style my solution has many projects(Modules). In order to use WPF+EF Code First databinding, i have made a Common project for dbcontext purpose and created EF Code First data source based on it. Now i am unable to access this data source in my modules(various projects of the solution). Even i have created references from the modules to the Common project but still data source is not visible. Is there any standard method of making EF data source visible for all the projects of the solution? Thanks!