A minor annoyance of mine is that there is no way to wire up a standard Silverlight TextBox to select its text when it receives the keyboard focus; either via a mouse click or a tab key. And since users are accustomed to web apps, browsers, and desktop applications that offer the the convenience of selecting textbox text upon focus, I wanted that behavior in my Silverlight applications. So to satisfy user expectations as a matter of consistency, I wrote a very simple derived class, TextBoxEx, that will offer this functionality. The TextBoxEx class derives from TextBox, and can be referenced in XAML for any and all of your TextBox’s. There are no methods to call. It just listens for Focus events and selects it own text. Very simple.