The old value of the System.Windows.Controls.ContentControl.Content property.
The new value of the System.Windows.Controls.ContentControl.Content property.
OnContentChanged Method (DataTemplateSelector)
Called when the System.Windows.Controls.ContentControl.Content property changes.
Syntax
protected override void OnContentChanged( 
   object oldContent,
   object newContent
)

Parameters

oldContent
The old value of the System.Windows.Controls.ContentControl.Content property.
newContent
The new value of the System.Windows.Controls.ContentControl.Content property.
Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

See Also