using System.Diagnostics;
using WindowsJobAPI;

using Process process = Process.Start(new ProcessStartInfo
{
    FileName = "cmd.exe",
    UseShellExecute = false,
}) ?? throw new InvalidOperationException("Unable to start the process.");

using JobObject job = new();
if (!job.AddProcess(process))
{
    throw new InvalidOperationException("Unable to add the process to the job.");
}

// Disposing job terminates process and any child processes in the same job.