Using ElementName on Binding gives me an error

Hi,

I'm using Xamarin.Forms.Behaviors and i'm trying to pass through the CommandParameter the SelectedItem to my ViewModel using RelayCommand, but always get an error saying:

"Xamarin.Forms.Xaml.XamlParseException: No Property of name ElementName found"

<ListView ItemsSource="{Binding Pharmacies}" x:Name ="Pharmacies_MyPharmacies" RowHeight="100" Grid.Row="0" Grid.Column="0">
    <b:Interaction.Behaviors>
      <b:BehaviorCollection>
        <b:EventToCommand EventName="ItemSelected" Command="{Binding PharmacySelectedCommand}" CommandParameter="{Binding SelectedItem, ElementName=Pharmacies_MyPharmacies}"/>
      </b:BehaviorCollection>
    </b:Interaction.Behaviors>
    <ListView.ItemTemplate>
      <DataTemplate>
        <ViewCell>
          <ViewCell.View>
            <CustomControls:PharmacyControl PharmacyName="{Binding Name}" PharmacyAddress="{Binding FullAddress}" LogoSource="{Binding Logo}" IsSelected="{Binding IsSelected}" IsDefault="{Binding IsDefault}"></CustomControls:PharmacyControl>
          </ViewCell.View>
        </ViewCell>
      </DataTemplate>
    </ListView.ItemTemplate>
  </ListView>

This is my List where i'm using the command, this works good on Windows c# XAML development, now i'm looking for a Xamarin.Forms solution for this.

Thanks,
Emanuel