C#

<br />
using Microsoft.Win32;<br />
<br />
...<br />
SystemEvents.PowerModeChanged +=new PowerModeChangedEventHandler(SystemEvents_PowerModeChanged);<br />
...<br />
<br />
private void SystemEvents_PowerModeChanged(object sender, PowerModeChangedEventArgs e) <br />
{<br />
    System.Windows.Forms.MessageBox.Show("Power Off!!!!!!!!!!!!!!!!!!");<br />
}

[Serializable]<br />
public class S1<br />
{<br />
   private object _value = new Unit () ;<br />
   public object TheValue  { get { return _value ; } set { _value = value ; } }<br />
}

XmlSerializer xs = new XmlSerializer(typeof(S1));<br />
xs.Serialize(new MemoryStream() , new S1());

[Serializable]<br />
public class S2<br />
{<br />
   private Unit_value = new Unit () ;<br />
   public Unit TheValue  { get { return _value ; } set { _value = value ; } }<br />
}

[Serializable]<br />
public class S2<br />
{<br />
   private object_value = new Guid () ;<br />
   public object TheValue  { get { return _value ; } set { _value = value ; } }<br />
}