Is your feature request related to a problem? Please describe.
Docs is missing description for Multipart uploads.
https://github.com/box/box-windows-sdk-v2/blob/master/docs/files.md#upload-a-file
Boxmultipartupload method found here
Describe the solution you'd like
Add BoxMultipart example in docs
Describe alternatives you've considered
na
Additional context
na