<Setter Property="RenderTransformOrigin" Value="0.5 0.5" />

            <Setter Property="RenderTransform">

                <Setter.Value>

                    <RotateTransform />

                </Setter.Value>

            </Setter>

            <Style.Triggers>

                <EventTrigger RoutedEvent="Button.Click">

                    <BeginStoryboard>

                        <Storyboard TargetProperty="RenderTransform.Angle">

                            <DoubleAnimation

                                From="-5" To="5" Duration="0:0:0.05"

                                AutoReverse="True"

                                RepeatBehavior="100x"

                                FillBehavior="Stop" />

                        </Storyboard>

                    </BeginStoryboard>

                </EventTrigger>

            </Style.Triggers>