DPDP03_g6.cs

public class RepositoryFactory
{
    private IOrganizationService service;
    public RepositoryFactory(IOrganizationService service)
    {
        this.service = service;
    }
    public T Get<E, T>() where E : Entity where T : RepositoryBase<E>
    {
        var repository = (T)Activator.CreateInstance(typeof(T), this.service); 
        return repository;
    } 
}