private void setActiveMon(PerformanceMonitorBase mon)
 {
     if (_currentMonitor != null) { _currentMonitor.Destory(); }
     _currentMonitor = mon;
     _currentMonitor.form = this;
     _currentMonitor.Init();
 }
 private void setActiveMon(PerformanceMonitorBase mon)
 {
     if (_currentMonitor != null)
     {
         _currentMonitor.Destory();
     }
     _currentMonitor      = mon;
     _currentMonitor.form = this;
     _currentMonitor.Init();
 }