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POProcess.Start is blocking
 

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    <p>I'm calling Process.Start, but it blocks the current thread.</p> <pre><code>pInfo = new ProcessStartInfo("C:\\Windows\\notepad.exe"); // Start process mProcess = new Process(); mProcess.StartInfo = pInfo; if (mProcess.Start() == false) { Trace.TraceError("Unable to run process {0}."); } </code></pre> <p>Even when the process is closed, the code doesn't respond anymore.</p> <p>But Process.Start is really supposed to block? What's going on?</p> <p><em>(The process start correctly)</em></p> <hr> <pre><code>using System; using System.Diagnostics; using System.Threading; using System.Windows.Forms; namespace Test { class Test { [STAThread] public static void Main() { Thread ServerThread = new Thread(AccepterThread); ServerThread.Start(); Console.WriteLine (" --- Press ENTER to stop service ---"); while (Console.Read() &lt; 0) { Application.DoEvents(); } Console.WriteLine("Done."); } public static void AccepterThread(object data) { bool accepted = false; while (true) { if (accepted == false) { Thread hThread = new Thread(HandlerThread); accepted = true; hThread.Start(); } else Thread.Sleep(100); } } public static void HandlerThread(object data) { ProcessStartInfo pInfo = new ProcessStartInfo("C:\\Windows\\notepad.exe"); Console.WriteLine("Starting process."); // Start process Process mProcess = new Process(); mProcess.StartInfo = pInfo; if (mProcess.Start() == false) { Console.WriteLine("Unable to run process."); } Console.WriteLine("Still living..."); } } } </code></pre> <p>Console output is:</p> <blockquote> <p>--- Press ENTER to stop service --- Starting process.</p> </blockquote> <hr> <p>Found it: </p> <p><strong>[STAThread]</strong></p> <p>Makes the Process.Start blocking. I read <a href="https://stackoverflow.com/questions/165316/stathread-and-multithreading">STAThread and Multithreading</a>, but I cannot link the concepts with Process.Start behavior.</p> <p>AFAIK, STAThread is <em>required</em> by Windows.Form. How to workaround this problem when using Windows.Form?</p> <hr> <p><em>News for the hell:</em></p> <p>If I rebuild my application, the <strong>first</strong> time I run application work correctly, but if I stop debugging and restart iy again, the problem araise.</p> <p>The problem is not raised when application is executed without the debugger.</p>
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    1. COSet `UseShellExecute` and `ErrorDialog` to true and see if there are any errors being generated.
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      1. USAMissico
    2. COWell given that we don't know what the "cDaemon" class does, it's kinda hard to tell what's going on. Please try to come up with a short but *complete* program which demonstrates the problem.
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    3. CO(That use of Application.DoEvents combined with Console.Read looks pretty suspicious though.)
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