C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Threading;
using System.Runtime.InteropServices;
using System.IO.MemoryMappedFiles;

namespace ConsoleApplication25
{
    class Program
    {
        static void Main(string[] args)
        {
            MemoryCreate<MemWriter> SharedData = new MemoryCreate<MemWriter>();
            MemWriter MemWriterObj = new MemWriter();
            if (!SharedData.open()) return;
            MemWriterObj.f=10;
            MemWriterObj.mystring = "Test";
            SharedData.Writer = MemWriterObj;
            Console.ReadLine();
            SharedData.close();
        }
    }
    class MemoryCreate<T> where T:struct
    {
        MemoryMappedFile mmf;
        MemoryMappedViewAccessor accessor;
       public bool open()
        {
           try
           {
               mmf = MemoryMappedFile.CreateNew("Test", 100);
               accessor = mmf.CreateViewAccessor(0, 0);
               return true;
           }
           catch(Exception e)
           {
               Console.WriteLine(e.Message);
               return false;
           }
       }
           public void close()
           {
               accessor.Dispose();
               mmf.Dispose();
           }
        public T Writer
           {
               set
               {
                   try
                   {
                       accessor.Write<T>(0, ref value);
                   }
                   catch(Exception e)
                   {
                       Console.WriteLine(e.Message);
                   }
               }
           }
        }
    [StructLayout(LayoutKind.Sequential,Pack=1,CharSet=CharSet.Ansi)]
    struct MemWriter
    {
        public int f;
        [MarshalAs(UnmanagedType.ByValTStr,SizeConst=16)] public string mystring;
    }
}

Environment: - Windows XP/Windows7 32bit, 64 bit/Windows 2008 Server 64 bit/Windows 2012 Server 64 bit
.
Application Details: -
Application.exe [Visual Studio C# created]
Extract.exe [Visual Studio C# created]
.Net Frame Work: - 3.5 .Net Frame Work
.
Product Description: - We have a product Application.exe, which launch another process Extract.exe in command line for extracting image documents, after extraction; we store data into text file and read from Application.exe and store into data base.
Note: - Application.exe start from services.msc.
.
We run multiple instance of Application.exe after renaming it as Application-FirstInstance.exe, Application-SecondInstance.exe; each application exe launches Extract.exe. We create service for each Application-{Instance}.exe. Application works fine in multiple instances environment, but during run of each service; there are many Extract.exe and Application-{Instance}.exe visible in task manager.
.
Requirement Description: -
We want to kill related Extract.exe on stopping Application-{Instance}.exe from services, and it would be instant operation.
But we have to make sure that related Extract.exe is deleting, while stopping Application-{Instance}.exe from services. What will be right way to identifying particular Application-{Instance}.exe and related Extract.ext and killing operation?
.

Kindly assist us to find the resolution. Please let us know, if more information is required.
We will be really thankful.