Today, in our work as in our life, is more important know how to find information rather than know the information itself. I mean that a good developer is the person able to find documentation, the person who network about its job and that share with an open mind.
I am an experienced .NET developer and, belive me, every project i am working on I have to learn new thing about the langiuage and the development environement. Our work is always more intricated so, do not worry. Point your attention to the problem solving and then look for help. All the solutions already exist: we must be able to find it.