(in PresentationFramework.dll)XMLNS for XAML:
public event EventHandler Initialized
<object Initialized="EventHandler" .../>
This event will be raised whenever the EndInit or OnInitialized methods are called. Calls to these methods could have been made by deliberate code, or by the Extensible Application Markup Language (XAML) loading process.
Supported in: 4.6, 4.5, 4, 3.5, 3.0
.NET Framework Client Profile
Supported in: 4, 3.5 SP1