I try to upload an image (choosen by FileOpenPicker) but it doesn't work. My code: var openpicker = new FileOpenPicker(); openpicker.SuggestedStartLocation = PickerLocationId.PicturesLibrary; openpicker.FileTypeFilter.Add(".jpg"); openpicker.FileTypeFilter.Add(".png"); var file = await openpicker.PickSingleFileAsync(); var uploader = new Windows.Networking.BackgroundTransfer.BackgroundUploader(); PasswordCredential pw = new PasswordCredential(); pw.Password = "mypw"; pw.UserName = "user"; uploader.ServerCredential = pw; uploader.Method [...] read more