# Project 1:

Base class:
public abstract class BaseRepository
{
    private protected Task<string> GetEmail(int id)
    {
        return Task.FromResult("username@mail.com");
    }
}

Inheritance works!
public class AccountRepository : BaseRepository
{
    public async Task UpdateEmail(int id, string newEmail)
    {
        var currentEmail = await GetEmail(id);
    }
}

# Project 2:
Inheritance fails with error: "BaseRepository.GetEmail(int) is inaccessible due to its protection level"
public class CustomerRepository : BaseRepository
{
    public async Task UpdateCustomer(int id, string newEmail)
    {
        var currentEmail = await GetEmail(id);
    }
}

#Note:
Using [assembly: InternalsVisibleTo("Project2") in AssemblyInfo.cs of "Project1" will of course make the method visible.