Process.WaitForExit() not waiting

Question

Using Visual Studio Version 17.12.3

C# Winforms with .Net Framework 4.8.1

I am building the installation process for my application.  In this particular situation, I need to spawn a process to run the installer for the database provider based on the user's selection.  I would like to have the shelled application complete and return cotrol to the install process.

I followed the document "Use Visual C# to wait for a shelled application to finish" on the Microsoft site.  What I am experiencing is the line p.WaitForExit() does not wait, the code will continue.  I have tried placing a wait value of varying size with no affect.

This is the first time I have tried this and not quite sure if I am doing the right thing oe is there a better way to accomplish this.

Here is the code snip in question.  This is enclosed in a Try/Catch.

string sysFolder = Environment.GetFolderPath(Environment.SpecialFolder.System);
ProcessStartInfo pInfo = new ProcessStartInfo();
pInfo.FileName = sysFolder + @"\notepad.exe";
Process p = Process.Start(pInfo);
p.WaitForInputIdle();
p.WaitForExit();
if (p.HasExited == false)
{ p.WaitForExit(5000); }
return p.ExitCode == 0;