Register null as instance in Unity container

Question

I have a repository class with optional dependency:

class MyRepository : BaseRepository, IMyRepository
{
    public MyRepository(IDataContext dataContext, IC         


        

Answer 1

In the .RegisterType() call, specify the InjectionConstructor with an OptionalParameter, as in

.RegisterType(new InjectionConstructor(
new ResolvedParameter(), 
new OptionalParameter()));