WebFile questions.

I have some questions related to WebFile when created with the class method WebFile.Open() and the parameter InMemory=False.

When the WebFile upload process terminates there is something strange: the memory used by the application for the transfer (roughly the same amount of the file size) isn’t freed.
The memory isn’t freed also if the browser initiates another session.

This does not happens if the upload gets aborted before completion or when the browser that requested the file terminates.

WebApplication running on Win7.

It is normal?