[RunInstaller(true)]
   public class InstallClassRegAsm: Installer
   {
      public InstallClassRegAsm() :base()
      {
      }
      #region Install
      //---Override the 'Install' method.
      public override void Install(IDictionary savedState)
      {
         base.Install(savedState);
         //---the assembly to register
         string strAssemblyFile = base.Context.Parameters["name"].ToString();
         //---checkpoint 
         Trace.WriteLine(string.Format("Install {0}", strAssemblyFile));
         //---load assembly 
         Assembly objAsm = Assembly.LoadFrom(strAssemblyFile);
         
         //---action
         RegistrationServices  objRS = new RegistrationServices();
         objRS.RegisterAssembly(objAsm, AssemblyRegistrationFlags.SetCodeBase);     
      }
      #endregion
      #region Uninstall
      //---Override the 'Uninstall' method.
      public override void Uninstall(IDictionary savedState)
      {
         base.Uninstall(savedState);
         //---the assembly to register
         string strAssemblyFile = base.Context.Parameters["name"].ToString();
         //---checkpoint 
         Trace.WriteLine(string.Format("Uninstall {0}", strAssemblyFile));
         //---load assembly 
         Assembly objAsm = Assembly.LoadFrom(strAssemblyFile);
   
         //---action
         RegistrationServices  objRS = new RegistrationServices();
         objRS.UnregisterAssembly(objAsm);   
      }
      #endregion
   }