The RC build also includes built-in model-binder support for uploaded files and multi-part mime content. 

For example, we could have a <form> whose enctype attribute is set to “multipart/form-data” perform a post to the /PhotoManager/UploadPhoto URL.  If a <input type=”file” name=”fileToUpload”/> element was within the form it would cause the file selected by the end-user to be passed to our action method as an HttpPostedFileBase object:

Figure 42

We could then use the HttpPostedFileBase object to get access to the raw bytes of the uploaded file, its mime-type, and optionally save it to a database or disk.