how to detect that Outlook is installed in my computer

thank's but thy lack an (using reference)

Please check the link: http://www.eggheadcafe.com/tutorials/aspnet/cb972d77-0892-4bf7-834d-c23b6dd5c03a/c--get-the-all-running.aspx

If it doesn't work, Here is the code.

Complete C# code:
=============
using System;
using System.Collections.Generic;
using System.Text;
using System.Management;
using System.ComponentModel;
using System.Diagnostics;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            GetProcesses();
            GetApplications();
            Console.Read();
        }

        public static void GetProcesses()
        {
            StringBuilder sb = new StringBuilder();
            ManagementClass MgmtClass = new ManagementClass("Win32_Process");

            foreach (ManagementObject mo in MgmtClass.GetInstances())          
                Console.WriteLine("Name:" + mo["Name"] + "ID:" + mo["ProcessId"]);              
           
            Console.WriteLine();
        }

        public static void GetApplications()
        {
            StringBuilder sb = new StringBuilder();
            foreach (Process p in Process.GetProcesses("."))
            {
                try
                {
                    if (p.MainWindowTitle.Length > 0)
                    {
                        Console.WriteLine("Window Title:" + p.MainWindowTitle.ToString());
                        Console.WriteLine("Process Name:" + p.ProcessName.ToString());
                        Console.WriteLine("Window Handle:" + p.MainWindowHandle.ToString());
                        Console.WriteLine("Memory Allocation:" + p.PrivateMemorySize64.ToString());                    
                    }
                }
                catch { }
            }           
        }
    }
}

Example Output on my machine:
================
Name:System Idle ProcessID:0
Name:SystemID:4
Name:explorer.exeID:532
Name:smax4pnp.exeID:2880
Name:DVDLAU~1.EXEID:2580
Name:winampa.exeID:2140
Name:OUTLOOK.EXEID:9544
Name:ccSvcHst.exeID:30580
Name:ccApp.exeID:31680

Window Title:ConsoleApplication1 (Running) - Microsoft Visual Studio
Process Name:devenv
Window Handle:2558386
Memory Allocation:53194752
Window Title:Inbox - Microsoft Outlook
Process Name:OUTLOOK
Window Handle:7209408
Memory Allocation:40906752
Window Title:. Mozilla Firefox
Process Name:firefox
Window Handle:16515780
Memory Allocation:163573760