Silverlight has a powerful model to customize the look and feel of controls.

For example, you can alter the looks of a Button control by not supplying just a text for its content property, but an elipse with text in it. That way, the button will not be rendered as a default button, but use your own supplied style.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>

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To be able to easily reuse your custom template, you can define a style in the App.xaml and manually set the style property on the button control. This works similar like CSS.<o:p></o:p>

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Example template to show the content of a button as an image (App.xaml):<o:p></o:p>

<Style x:Key="ImageButtonStyle" TargetType="Button"><o:p></o:p>

            <Setter Property="Template">

                <Setter.Value>

                    <ControlTemplate TargetType="Button">

                        <Grid>

                            <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center">

                                <ContentPresenter.Content>

                                    <Image Source="{TemplateBinding Content}"></Image>

                                </ContentPresenter.Content>

                            </ContentPresenter>

                        </Grid>

                    </ControlTemplate>

                </Setter.Value>

            </Setter>

        </Style>

 You can set the style on your button this way: <Button Style="{StaticResource ImageButtonStyle}" Content="Img.png">