为什么在调用process.start时StartInfo.stuff不起作用，但是Process.start在C＃中可以正常工作

Question

I'm trying to uninstall some redistributables from a C# program, so I look through the Program ID values stored in my app.config and then try to run msiexec to uninstall them. If I store the parameters in a ProcessStartInfo object the call doesn't work, but if I call Process.Start("stuff") it works fine. Why is that? I want to use ProcessStartInfo so that I have more control over the window that pops up.

This doesn't work:

Process process = new Process();
ProcessStartInfo startInfo = new ProcessStartInfo();
startInfo.WindowStyle = ProcessWindowStyle.Hidden;
int numberOfKeys = ConfigurationManager.AppSettings.Count;

for (int i = 0;  i < numberOfKeys; i++)
{
   string[] guid = ConfigurationManager.AppSettings.GetValues(i);
   startInfo.Arguments = "/X " + guid[0] + " /l*vx log" + i.ToString() + ".txt";
   startInfo.CreateNoWindow = true;
   startInfo.FileName = "msiexec.exe";
   process.StartInfo = startInfo;
   var result = process.Start();
}

But this does:

int numberOfKeys = ConfigurationManager.AppSettings.Count;

for (int i = 0; i < numberOfKeys; i++)
{
    string[] guid = ConfigurationManager.AppSettings.GetValues(i);
    var result = Process.Start("msiexec.exe", "/X " + guid[0] + " /l*vx log" + i.ToString() + ".txt");
}

Can anyone explain why?

Answer 1

I got it to work by putting a Sleep(10000) after the call. Thanks for the suggestions!