curl -i -X OPTIONS "https://api.box.com/2.0/files/content" \
     -H "authorization: Bearer <ACCESS_TOKEN>" \
     -H "content-type: application/json" \
     -d '{"name":"Contract.pdf", "parent":{"id":"11446498"}}'

await client.uploads.preflightFileUploadCheck({
  name: newFileName,
  size: 1024 * 1024,
  parent: { id: '0' } satisfies PreflightFileUploadCheckRequestBodyParentField,
} satisfies PreflightFileUploadCheckRequestBody);

client.uploads.preflight_file_upload_check(
    name=new_file_name, size=1024 * 1024, parent=PreflightFileUploadCheckParent(id="0")
)

await client.Uploads.PreflightFileUploadCheckAsync(requestBody: new PreflightFileUploadCheckRequestBody() { Name = newFileName, Size = 1024 * 1024, Parent = new PreflightFileUploadCheckRequestBodyParentField() { Id = "0" } });

String fileName = "My Doc.pdf";
BoxFolder rootFolder = BoxFolder.getRootFolder(api);
try {
    folder.canUpload(fileName, 98734576);

    // If the file upload would not have succeeded, it will not be attempted
    folder.uploadFile(fileContents, fileName);
} catch (BoxAPIException ex) (

)

// Verify that uploading a 200MB file named "Preso.ppt" to folder 12345 would succeed
client.files.preflightUploadFile(
		'12345',
		{
			name: 'Preso.ppt',
			size: 200000000
		},
		null,
		callback
	);