How wait asynchronous method in a thread?

Question

I need that Join method is called when Download.file method have finished. I tried to add await keyword but it didn't work

Thread myThread = new Thread(new ThreadStart(()=> await Download.file(uri))); Thread myThread = new Thread(new ThreadStart(()=>Download.file(uri))); myThread.Start(); myThread.Join(); class Download{ public static async void file(string url) { try { HttpWebRequest request; HttpWebResponse webResponse = null; request = HttpWebRequest.CreateHttp(url); request.AllowReadStreamBuffering = true; webResponse = await request.GetResponseAsync() as HttpWebResponse; Stream responseStream = webResponse.GetResponseStream(); using (StreamReader reader = new StreamReader(responseStream)) { string content = await reader.ReadToEndAsync(); } webResponse.Close(); } catch (Exception ex) { Debug.WriteLine(ex.Message); } } }

Thanks

Jon Skeet · Accepted Answer · 2013-05-18 10:34:19Z

You should make your file method (which is badly named, by the way - it should probably be something like DownloadFileAsync) return Task instead of void.

Then you can await it.

However, it's not clear why you're starting this in a different thread anyway - the point of asynchrony is that you don't need to start a new thread. From another async method, you can just use:

await Download.file(uri);

(Of course the fact that the method isn't doing anything with the content is a little strange...)

You should also consider using HttpClient or WebClient, both of which have this behaviour already available.

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