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POProcess.Start() hangs when running on a background thread
 

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    <p>I've been troubleshooting all day. After doing some <a href="http://jake.ginnivan.net/redirecting-process-output" rel="nofollow">research</a> and a lot of trial and error, it seems I've been able to narrow down the issue to the fact that my call to <code>process.Start()</code> doesn't work on a timer thread. The code below works when running on the main thread. Put that exact same code in a timer callback, and it hangs. Why? How do I get it to work with a timer?</p> <pre><code>private static void RunProcess() { var process = new Process(); process.StartInfo.FileName = "cmd"; process.StartInfo.Arguments = "/c exit"; process.StartInfo.UseShellExecute = false; process.StartInfo.RedirectStandardError = true; process.StartInfo.RedirectStandardInput = true; process.StartInfo.RedirectStandardOutput = true; process.Start(); // code hangs here, when running on background thread process.StandardOutput.ReadToEnd(); process.WaitForExit(); } </code></pre> <p><strong>EDIT</strong></p> <p>As a test, I used this exact same code on another laptop, and I experienced the same problem. This is complete code that can be pasted into a console app. <code>process.Start()</code> hangs, but as soon as I hit any key to end, <code>process.Start()</code> completes before the program ends.</p> <pre><code>private static System.Timers.Timer _timer; private static readonly object _locker = new object(); static void Main(string[] args) { ProcessTest(); Console.WriteLine("Press any key to end."); Console.ReadKey(); } private static void ProcessTest() { Initialize(); } private static void Initialize() { int timerInterval = 2000; _timer = new System.Timers.Timer(timerInterval); _timer.Elapsed += new ElapsedEventHandler(OnTimerElapsed); _timer.Start(); } private static void OnTimerElapsed(object sender, ElapsedEventArgs e) { if (!Monitor.TryEnter(_locker)) { return; } // Don't let multiple threads in here at the same time. try { RunProcess(); } finally { Monitor.Exit(_locker); } } private static void RunProcess() { var process = new Process(); process.StartInfo.FileName = "cmd"; process.StartInfo.Arguments = "/c exit"; process.StartInfo.UseShellExecute = false; process.StartInfo.RedirectStandardError = true; process.StartInfo.RedirectStandardInput = true; process.StartInfo.RedirectStandardOutput = true; process.Start(); // ** HANGS HERE ** process.StandardOutput.ReadToEnd(); process.WaitForExit(); } </code></pre>
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    1. COWorks fine, as expected and as it should. You'll need try this is another machine or a VM without any crudware loaded.
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    2. COIn what way can crudware cause this? Any idea how to identify the culprit?
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    3. CO@HansPassant I've duplicated this issue on another laptop. I've posted complete code that can be run as a test. That would lead me to believe that the issue isn't crudware. (Unless I have the same crudware on both systems.)
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