R – Silverlight – Multiline textbox – Alt + Enter Issue

I am stuck with the small issue…

I am using Silverlight.

I have a textbox with multiline property true.
and i want the facillity that when user press "ALT + Enter" then cursor should move to the next line.

I have already set the properties like AcceptsReturn, TextWrapping. But it is not working 🙁

Can anyone please shed some light on this?

Thanks,
Mahesh

Here is sample code:

Style x:Key="MultilineTextBoxCellStyle" TargetType="TextBox">
Setter Property="AcceptsReturn" Value="True"/>
Setter Property="TextWrapping" Value="Wrap"/>
Setter Property="Height" Value="100"/>
Setter Property="Page:MultilineTextboxScrollbar.MyVsbv" Value="Auto" />

I am giving this style to dynamic created textbox: Which is in grid view ….

dataColumn.EditorSettings = new TextBoxEditorSettings();
dataColumn.EditorSettings.CellEditStyle = (Style)this.Resources["MultilineTextBoxCellStyle"];

THanks,
Mahesh