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public static class ProcessExtensions
    {
        private static string FindIndexedProcessName(int pid)
        {
            var processName = Process.GetProcessById(pid).ProcessName;
            var processesByName = Process.GetProcessesByName(processName);
            string processIndexdName = null;

            for (var index = 0; index < processesByName.Length; index++)
            {
                processIndexdName = index == 0 ? processName : processName + "#" + index;
                var processId = new PerformanceCounter("Process", "ID Process", processIndexdName);
                if ((int) processId.NextValue() == pid)
                {
                    return processIndexdName;
                }
            }

            return processIndexdName;
        }

        private static Process FindPidFromIndexedProcessName(string indexedProcessName)
        {
            var parentId = new PerformanceCounter("Process", "Creating Process ID", indexedProcessName);
            return Process.GetProcessById((int) parentId.NextValue());
        }

        public static Process Parent(this Process process)
        {
            return FindPidFromIndexedProcessName(FindIndexedProcessName(process.Id));
        }
    }

var processes = Process.GetProcessesByName("chrome").Select(i => new {ParentID = i.Parent().Id, i.Id}).ToArray();