while (true)
        {
            //keep checking if timer expired or app closed externally (ie. by user)
            if (dtEndTime <= DateTime.Now || p.HasExited)
            {
                if (!p.HasExited)
                    p.Kill();
                break;
            }
            System.Threading.Thread.Sleep(500);
        }

try
{
    if(!p.HasExited)
    {
        p.Kill();
    }
    break;
}
catch(Exception ex)
{
    System.Diagnostics.Trace.WriteLine(String.Format("Could not kill process {0}, exception {1}", p.ToString(), ex.ToString()));
}

using System;
public class MyClass
{
    public static void Main()
    {
    	System.AppDomain.CurrentDomain.UnhandledException += MyExceptionHandler;
    	System.Threading.ThreadPool.QueueUserWorkItem(DoWork);
    	Console.ReadLine();
    }

    private static void DoWork(object state)
    {
    	throw new ApplicationException("Test");
    }

    private static void MyExceptionHandler(object sender, System.UnhandledExceptionEventArgs e)
    {
    	// get the message
    	System.Exception exception = e.ExceptionObject as System.Exception;
    	Console.WriteLine("Unhandled Exception Detected");
    	if(exception != null)
    		Console.WriteLine("Message: {0}", exception.Message);
    	// for this console app, hold the window open until I press enter
    	Console.ReadLine();
    }

}

p.WaitForInputIdle(10000);
am.hWnd = p.MainWindowHandle;

while (true)
{
   //keep checking if timer expired or app closed externally (ie. by user)
   if (dtEndTime <= DateTime.Now || p.HasExited)  {
      try {
          if (!p.HasExited)  // if the app hasn't already exitted...
          {
             if (!p.CloseMainWindow())  // did message get sent?
             {
                if (!p.HasExited)  //has app closed yet?
                {
                   p.Kill();  // force app to exit
                   p.WaitForExit(2000);  // a few moments for app to shut down
                }
             }
             p.Close();  // free resources
          }
       }
      catch { // blah blah }
      break;
   }
   System.Threading.Thread.Sleep(500);
}