Kill child process when parent process is killed

Question

I\'m creating new processes using System.Diagnostics.Process class from my application.

I want this processes to be killed when/if my application has cr

Answer 1

Just my 2018 version. Use it aside your Main() method.

    using System.Management;
    using System.Diagnostics;

    ...

    // Called when the Main Window is closed
    protected override void OnClosed(EventArgs EventArgs)
    {
        string query = "Select * From Win32_Process Where ParentProcessId = " + Process.GetCurrentProcess().Id;
        ManagementObjectSearcher searcher = new ManagementObjectSearcher(query);
        ManagementObjectCollection processList = searcher.Get();
        foreach (var obj in processList)
        {
            object data = obj.Properties["processid"].Value;
            if (data != null)
            {
                // retrieve the process
                var childId = Convert.ToInt32(data);
                var childProcess = Process.GetProcessById(childId);

                // ensure the current process is still live
                if (childProcess != null) childProcess.Kill();
            }
        }
        Environment.Exit(0);
    }