Get File Timestamp from Dropbox

Question

I have the following code:

        private static void Download(DropboxClient client, string dropboxfolder, string localfolder, FileMetadata file)
        {
            //Console.WriteLine("Download file...");
            var task1 = client.Files.DownloadAsync(dropboxfolder + "/" + file.Name);
            task1.Wait();
            using (var response = task1.Result)
            {
                Console.WriteLine("Downloaded {0} Rev {1}", response.Response.Name, response.Response.Rev);
                Console.WriteLine("------------------------------");
                using (Stream output = File.OpenWrite(Path.Combine(localfolder, response.Response.Name)))
                {
                    var task2 = response.GetContentAsStreamAsync();
                    task2.Wait();
                    using (Stream input = task2.Result)
                    {
                        input.CopyTo(output);
                    }
                }
                Console.WriteLine("------------------------------");
            }
        }

how do I modify it such that the output file will have the same timestamp as the file in dropbox.

[EDIT] I know how to set a date of a file in C#, but I don't know how to get that timestamp from dropbox in order to call that method. The question I am asking is more generic than that because perhaps there is an option on the dropbox API that allows the file to be set by dropbox.