I want to know if it is possible to download/uplaod folders using Dropbox Api in C#
Also is there any filter that we can specify while downlaoding/uploading folders.
The API doesn't offer the ability to upload/download entire folders at once, so you'll need to loop through the files you want to upload/download and call for them individually (applying whatever filtering logic you want client-side). We'll consider this a feature request though.