SelectTextOnFocus
The SelectTextOnFocus behavior makes it easy to select all text when a TextBox receives the focus.
1) Add the following XML namespaces:
xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity" xmlns:catel="http://catel.codeplex.com"
2) Use the following definition:
<TextBox Text={Binding Amount}"> <i:Interaction.Behaviors> <catel:SelectTextOnFocus /> </i:Interaction.Behaviors> </TextBox>