I have a custom model binder that uses data from session, tempdata, and form collection (hypothetically, of course!). When testing my model binder, need to create a ModelBindingContext with a ValueProvider. Trouble is, I can't see how I can have one ValueProvider that serves multiple value provider types. Any words of wisdom?

ValidModelBindingContext = new ModelBindingContext
                           {
                              ModelName = "SomeModel",
                              ValueProvider = ValidFormValueCollection
                           };