Download files from sharepoint onedrive

A-Gon350 

Sure... Onedrive is basically just a site collection just for you.

I use the "PnP.Framwork" library for that

This sample downloads all files from  the folder "downloadfolder" in your onedrive to your local folder.

It uses username/passwort authentication, but the "Authenticationmanager" xlass supports many other authentication methods

			string usernamne = "username";
			string password = "password";
			string folderPath = "/personal/<User>/downloadfolder";			
            string siteUrl = "https://<tenant>-my.sharepoint.com/personal/<User>/";
            

			// Authenticationmanager supports many different authentication methods, see documentation
            AuthenticationManager auth = new AuthenticationManager(username, password);
            
            ClientContext ctx = auth.GetContext(siteUrl);
            
        
            var folder=ctx.Web.GetFolderByServerRelativeUrl(folderPath);
            ctx.Load(folder);
            ctx.Load(folder.Files);
            ctx.ExecuteQueryRetry();
 
        
            foreach(var file in folder.Files)
            {
            
                Console.WriteLine(file.Name);                
                ctx.Load(file);
                ctx.ExecuteQuery();  

                Microsoft.SharePoint.Client.ClientResult<Stream> mstream = file.OpenBinaryStream();
                ctx.ExecuteQuery();
                var fileName = Path.Combine( Directory.GetCurrentDirectory(),"data", (string)file.Name);

                using (var fileStream = System.IO.File.Create(fileName))
                 {
                    mstream.Value.CopyTo(fileStream);
                }
            }