How to use EventAggregator in siliverligh5 to communicate between two UserControls

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user-controls

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Hello,
What I am trying to achieve is making two user control communicate with each other so that they can pass the values of controls like textboxes, comboboxes etc placed on them.

Brief on my design: I have a UserControl say Panel, I placed it on MainPage.Xaml, I haVe another UserControl MyTextBox, I placed that textbox on the first UserControl panel in design time and not as a pre-defined part of UserControl Panel. I want value of textbox on the MainPage.Xaml

When I searched on internet EventAggregator was hugely recommended for this purpose, But being new to the silverlight I am not able to implement that.

Can anyone please help me out for the implementing EventAggregator?

Little Code Snippet:

<my:ClassPanel Grid.Row="1" Grid.Column="1" Grid.ColumnSpan="3" Grid.RowSpan="3" my:Name="pnl">

            <my:TextBoxControl x:Name="txt1"></my:TextBoxControl>

</my:ClassPanel>

I want value of textbox on the mainpage.xaml.

Thanks in advance.