Kill process tree programatically in C#

http://stackoverflow.com/questions/5901679/kill-process-tree-programatically-in-c-sharp

    /// <summary>
    /// Kill a process, and all of its children.
    /// </summary>
    /// <param name="pid">Process ID.</param>
    private static void KillProcessAndChildren(int pid)
    {
        ManagementObjectSearcher searcher = new ManagementObjectSearcher("Select * From Win32_Process Where ParentProcessID=" + pid);
        ManagementObjectCollection moc = searcher.Get();
        foreach (ManagementObject mo in moc)
        {
            KillProcessAndChildren(Convert.ToInt32(mo["ProcessID"]));
        }
        try
        {
            Process proc = Process.GetProcessById(pid);
            proc.Kill();
        }
        catch (ArgumentException)
        {
            // Process already exited.
        }
    }