file not downloading properly - iphone

Question

I am downloading a file from a url and saving it to a directory on my phone.
the path is: /private/var/mobile/Applications/17E4F0B0-0781-4259-B39D-37057D44B778/Documents/samplefile.txt
However, when i debug the file is created and downloaded. But, when i ad-hoc it and run the file. samplefile.txt is created but it's blank.
Code:
String directory = Environment.GetFolderPath (Environment.SpecialFolder.MyDocuments);
var filename = Path.Combine (directory, "samplefile.txt");
if (!File.Exists (filename)) {
File.Create (filename);
var webClient = new WebClient ();
webClient.DownloadStringCompleted += (s, e) => {
var text = e.Result; // get the downloaded text
File.WriteAllText (filename, text);
};
var url = new Uri (/**myURL**/);
webClient.Encoding = Encoding.UTF8;
webClient.DownloadStringAsync (url);

Answer 1

I modified your sample slightly and the following works for me.
The StreamReader is only there just to re-read in the contents of the file to confirm that its the same contents in the file as that of the downloaded file:-
If you put a breakpoint there also you can manually inspect same contents as downloaded.
string directory = System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal);
var filename = Path.Combine(directory, "samplefile.txt");
if (!File.Exists(filename))
{
var webClient = new WebClient();
webClient.DownloadStringCompleted += (s, e) =>
{
// Write contents of downloaded file to device:-
var text = e.Result; // get the downloaded text
StreamWriter sw = new StreamWriter(filename);
sw.Write(text);
sw.Flush();
sw.Close();
sw = null;
// Read in contents from device and validate same as downloaded:-
StreamReader sr = new StreamReader(filename);
string strFileContentsOnDevice = sr.ReadToEnd();
System.Diagnostics.Debug.Assert(strFileContentsOnDevice == text);
};
var url = new Uri("**url here**, UriKind.Absolute);
webClient.Encoding = Encoding.UTF8;
webClient.DownloadStringAsync(url);
}