public static async Task<string> post()
        {
            var client = new HttpClient();

            string postData = "This is a test that posts this string to a Web server.";

            var response = await client.PostAsync("http://www.contoso.com/PostAccepter.aspx ", new StringContent(postData));
            var content = await response.Content.ReadAsStringAsync();
            return content.ToString();
}