To Add a custom ICON to your WPF application:

1. right click on the project name in the solution explorer.
2. Go to the Application tab, this should be the first one in Visual Studioj 2008
3. In this tab you can set the icon.

Please note that the icon sometimes will not show up when you are in debug mode. Run without debugging and BOOM - you have an Application ICON

To make a textbox multiline in WPF you have to set these 3 properties of TextBox Control.

1. TextWrapping="Wrap"
2. VerticalScrollBarVisibility="Visible"
3. AcceptsReturn="True"

BOOM -> multi-line