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  1. I have some nested async methods calling each other and it is confusing. I am trying to convert a project which downloads the files in an async download. On the click of the download button this is the method triggered: private async void enableOfflineModeToolStripMenuItem_Click(object sender, EventArgs e) { for(int i = 0; i < _playlists.Count; i++) { DoubleDimList.Add(new List<String>()); for(int j = 0; j < 5; j++) { string sMp3 = IniReadValue(_playlists[i], "Track " + j); DoubleDimList[i].Add(sMp3); } await Task.Run(() => _InetGetHTMLSearchAsyncs(DoubleDimList[i])); } } It creates a 2d List which at the end looks like this DoubleDimList[3][20]. At the end of each sublist I am doing an async download as you can see. The method looks like this private async Task _InetGetHTMLSearchAsyncs(List<string> urlList) { foreach (var url in urlList) { await Task.Run(() => _InetGetHTMLSearchAsync(url)); } } the _InetGetHTMLSearchAsync method looks like this and here is where it gets tricky private async Task _InetGetHTMLSearchAsync(string sTitle) { Runs++; if (AudioDumpQuery == string.Empty) { //return string.Empty; } string sResearchURL = "http://www.audiodump.biz/music.html?" + AudioDumpQuery + sTitle.Replace(" ", "+"); try { using (var client = new WebClient()) { client.Headers.Add("Referer", @"http://www.audiodump.com/"); client.Headers.Add("user-agent", "Mozilla / 5.0(Macintosh; Intel Mac OS X 10_9_3) AppleWebKit / 537.75.14(KHTML, like Gecko) Version / 7.0.3 Safari / 7046A194A"); client.DownloadStringCompleted += Client_DownloadStringCompleted; await Task.Run(() => client.DownloadStringAsync(new Uri(sResearchURL))); } } catch (Exception ex) { Console.WriteLine("Debug message: " + ex.Message + "InnerEx: " + ex.StackTrace); Console.WriteLine("Runs: " + Runs); //throw exception return; } } On Client_DownloadStringCompleted there is another async method called. Here it is private async void Client_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e) { string[] sStringArray; string aRet = e.Result; string[] aTable = _StringBetween(aRet, "<BR><table", "table><BR>", RegexOptions.Singleline); if (aTable != null) { string[] aInfos = _StringBetween(aTable[0], ". <a href=\"", "<a href=\""); if (aInfos != null) { for (int i = 0; i < 1; i++) { sStringArray = aInfos[i].Split('*'); sStringArray[0] = sStringArray[0].Replace("&#39;", "'"); aLinks.Add(sStringArray[0]); } await Task.Run(() => DownloadFile(aLinks[FilesDownloaded])); } } } From there, surprise! Another async call. private async Task DownloadFile(string url) { try { using (var client = new WebClient()) { client.Headers.Add("Referer", @"http://www.audiodump.biz/"); client.Headers.Add("user-agent", "Mozilla / 5.0(Macintosh; Intel Mac OS X 10_9_3) AppleWebKit / 537.75.14(KHTML, like Gecko) Version / 7.0.3 Safari / 7046A194A"); client.DownloadFileCompleted += Client_DownloadFileCompleted; await Task.Run(() => client.DownloadFileTaskAsync(url, mp3Path + "\\" + count + ".mp3")); } } catch (Exception Ex) { Console.WriteLine("File download error: " + Ex.StackTrace); //throw exception } } Now the first part after the creation of the 2d List is to retrieve the download links of the mp3s. The second part is to download the mp3 as soon as a valid URL was provided. It works but in a bizarre way. Instead of downloading the file normally(1st, 2nd, 3rd...), it will download randomly the files(1st, 5th, 8th...). Where am I messing this up because I definitely am!?
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