public static void Execute(StorageFolder device)
        {
            Console.WriteLine($"== Scenario8_DeleteFIlesAndFolders ==");

            // This sample demonstrates how to delete all folders and files at a location( whole folder tree )
            // The deletes the folders & files from Scenario5 & Scenario6

            try
            {
                StorageFolder folder11 = device.GetFolder("Folder11");

                // Delete contents of Folder11
                DeleteFolderTreeHelper(folder11);

                // Delete Folder11
                folder11.Delete();
            }
            catch (Exception ex)
            {
                Console.WriteLine($"ERROR: deleting folders & files : {ex.Message}");
            }
        }