Trying to get external user emails from folder/files in sharepoint using the API

Hi,

We are trying to export files/folders from Sharepoint using your C# Microsoft.SharePointOnline.CSOM. It's working fine for downloads but when we try to get external users for each file that we shared before, we can't see any external email address from file/folder details.

Could you please share a sample code to get that?

Thanks.