IHttpFile reference
This article provides reference material about the IHttpFile interface.

Properties
ContentType
The raw Content-Type header of the uploaded file.
FileName
The file name from the Content-Disposition header.
Length
The size of the uploaded content in bytes.
Name
The name of the form field, taken from the Content-Disposition header, which corresponds to the field name in the submitted form or API request.
Methods
CopyTo
Copies the uploaded content synchronously to the given target stream.
CopyToAsync
Copies the uploaded content asynchronously to the given target stream.
OpenReadStream
Opens a readable stream over the uploaded content.