how to find Workstations in a network

i have got the answer:

using System;
using System.Management;
using System.Windows.Forms;

namespace WMISample
{
    public class MyWMIQuery
    {
        public static void Main()
        {
            try
            {
                ManagementObjectSearcher searcher = 
                    new ManagementObjectSearcher("root\\CIMV2", 
                    "SELECT * FROM Win32_OperatingSystem WHERE ProductType = 2"); 

                foreach (ManagementObject queryObj in searcher.Get())
                {
                    Console.WriteLine("-----------------------------------");
                    Console.WriteLine("Win32_OperatingSystem instance");
                    Console.WriteLine("-----------------------------------");
                    Console.WriteLine("ProductType: {0}", queryObj["ProductType"]);
                }
            }
            catch (ManagementException e)
            {
                MessageBox.Show("An error occurred while querying for WMI data: " + e.Message);
            }
        }
    }
}

ProductType maps to below table :
Value =Meaning
1 = Work Station
2 = Domain Controller
3 = Server


http://msdn.microsoft.com/en-us/library/windows/desktop/aa394239%28v=vs.85%29.aspx[^]


Thanks,
Arshad