I can see that it's very easy to set the SelectedTime property in xaml, but how do I set the value in code behind?

<igtl:XamTimeline x:Name="xamTimeline" Width="1000" Height="250"   >
                    <igtl:XamTimeline.Axis  >
                        <igtl:NumericTimeAxis Minimum="1" Maximum="27" AutoRange="True" ShowLabels="True" Unit="1" SelectedTime="5" />
                    </igtl:XamTimeline.Axis>
                    <igtl:XamTimeline.PreviewAxis>
                        <igtl:PreviewAxis ShowLabels="True" />
                    </igtl:XamTimeline.PreviewAxis>
                    <igtl:XamTimeline.EventTitleLayoutSettings>
                        <igtl:EventTitleLayoutSettings HorizontalOffset="5"
                                       VerticalOffset="5" Enabled="True" />
                    </igtl:XamTimeline.EventTitleLayoutSettings>
</igtl:XamTimeline>