Async CTP exemplo 1

gistfile1.cs

        public async Task<int> SumPageSizesAsync(IList<Uri> uris) {
            int total = 0;
            int i = 0;
            int n = 0;
            foreach (var uri in uris) {
                Console.WriteLine("{0} - {1}", ++n, DateTime.Now.ToString("yyyyMMddHHmmssffff"));
                Console.WriteLine(string.Format("{0} Found {1} bytes ...", ++i, total));
                var wc = new WebClient();
                var data = await wc.DownloadDataTaskAsync(uri);
                Console.WriteLine("{0} - {1}", n, DateTime.Now.ToString("yyyyMMddHHmmssffff"));
                total += data.Length;
            }
            Console.WriteLine(string.Format("Found {0} bytes total", total));
            return total;
        }