In my View I got a ListView bound to a CollectionView in my ViewModel, for example like this:

<ListView ItemsSource="{Binding MyCollection}" IsSynchronizedWithCurrentItem="true">
  <ListView.View>
    <GridView>
      <GridViewColumn Header="Title" DisplayMemberBinding="{Binding Path=Title}"/>
      <GridViewColumn Header="Name" DisplayMemberBinding="{Binding Path=Name}"/>
      <GridViewColumn Header="Phone" DisplayMemberBinding="{Binding Path=Phone}"/>
      <GridViewColumn Header="E-mail" DisplayMemberBinding="{Binding Path=EMail}"/>
    </GridView>
  </ListView.View>
</ListView>

Right now these GridViewColumns are fixed, but I'd like to be able to change them from the ViewModel. I'd guess I'll have to bind the GridViewColumn-collection to something in the ViewModel, but what, and how?
The ViewModel does know nothing of WPF, so I got no clue how to achieve this in MVVM.

any help here?