[Solved] Get a list of all excel processes started by winform application

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Okay I have found the answer myself. I am sharing it just in case someone needs it. 

 int myappid = Process.GetCurrentProcess().Id;
            Process[] processes = Process.GetProcessesByName("EXCEL");          

            foreach (Process prs in processes)
            {
                var query = string.Format("SELECT ParentProcessId FROM Win32_Process WHERE ProcessId = {0}", prs.Id);
                var search = new ManagementObjectSearcher("root\\CIMV2", query);
                var results = search.Get().GetEnumerator();
                results.MoveNext();
                var queryObj = results.Current;
                var parentId = (uint)queryObj["ParentProcessId"];

                if (ProcessExists((int)parentId))
                {
                    var parent = Process.GetProcessById((int)parentId);

                    if (parent.Id == myappid)
                    {
                        prs.Kill();
                    }
                }
            }

 private bool ProcessExists(int id)
        {
            return Process.GetProcesses().Any(x => x.Id == id);
        }

In the above code Process[] processes = Process.GetProcesses(); would give me all the processes. I am looping though the collection and finding parent process id of each. If parent id matches my application process id and the name of the child process is excel, I kill it.

solved Get a list of all excel processes started by winform application