c# - Use Save Dialog with folder structure I provide possible? -

i working of cloud saving services , allow user save new documents created service of choice online. want use regular save dialog provide folder structure gathered account determine path upload file.

i've found examples of how customize save dialog still keeps core functionality of saving local computer, haven't found examples of how change that.

are there examples out there on how or there better way doing still intuitive user?

it possible if create shell namespace extension expose cloud service shell folders. microsoft not support writing 1 in c# because extension loaded process opens file dialog.

an alternative way ask user save folder synced cloud storage via background service. can limit user can save files in file dialog.