GET COMPUTER NAME

public List GetComputersOnNetwork()

{

    List list = new List();

    using (DirectoryEntry root = new DirectoryEntry("WinNT:"))

    {

        foreach (DirectoryEntry computers in root.Children)

        {

            foreach (DirectoryEntry computer in computers.Children)

            {

                if ((computer.Name != "Schema"))

                {

                    list.Add(computer.Name);

                    comboBox1.Items.Add(computer.Name );

                }

            }

        }

    }

    return list;

}