how to upload file in google drive c sharp

Its highly recommended to use official api of Google, so that you can get service and support.  Upload code: var fileMetadata =newFile(); fileMetadata.Name="My Report"; fileMetadata.MimeType="application/vnd.google-apps.spreadsheet"; FilesResource.CreateMediaUpload request; using(var stream =newSystem.IO.FileStream("files/report.csv", System.IO.FileMode.Open)) { request = driveService.Files.Create( fileMetadata, stream,"text/csv"); request.Fields="id"; request.Upload(); } var file = request.ResponseBody; Console.WriteLine("File ID: "+ file.Id); Complete reference can be found in the below link     https://developers.google.com/drive/v3/web/manage-uploads   Do let me know, if it solves your problem