I have a question about Silverlight on the Client Side

Question

I have a question about Silverlight on the Client Side.
Silverlight is designed differently where it is not possible for a silverlight program running inside a browser can have access to a user's hard drive.
This is a good thing and is important for security.
But there are times when it might be a good idea to save some settings on the client side.
I kind of remember that there is some sort of protected space for that.
Does anyone have any ideas?