How to Bind a LineSeries' ItemSource to a PointCollection with IsAsync="True"?

As the topic states, I want to Bind the data in a LineSeries to a PointCollection that I create, fill and mantain in Code-Behind through a Timer. I have some success with the simple approach:

<charting:LineSeries.ItemsSource>
    <PointCollection x:Name="pntCLeftHand"/>
</charting:LineSeries.ItemsSource>

And then Adding items into 'pntCLeftHand' in Code-Behind.

This works well, but I think the UI Updating is just too time consuming, so I want the Binding to be Asynchronous. The IsAsync pr开发者_运维百科operty would help me, but I guess this can only be used with something like the following:

<charting:LineSeries ItemsSource="{Binding pntCLeftHand, IsAsync=True}"/>

Unfortunately that just doesn't work.

Can somebody show me the way?

Thanks in advance.