I have done it using FullModeItemTemplate by showing the list options in another page.
code:
MainPage.xaml
<toolkit:ListPicker Header="country" x:Name="lp2" FullModeHeader="select country" Margin="35,233,27,45" Grid.Row="2">
<toolkit:ListPicker.ItemTemplate>
<DataTemplate x:Name="dt1">
<StackPanel>
<TextBlock Text="{Binding BindsDirectlyToSource=True}"/>
</StackPanel>
</DataTemplate>
</toolkit:ListPicker.ItemTemplate>
<toolkit:ListPicker.FullModeItemTemplate>
<DataTemplate x:Name="dt2">
<StackPanel>
<TextBlock Text="{Binding BindsDirectlyToSource=True}" FontSize="55" />
</StackPanel>
</DataTemplate>
</toolkit:ListPicker.FullModeItemTemplate>
</toolkit:ListPicker>
MainPage.xaml.cs
namespace ListPickerDemo
{
public partial class MainPage : PhoneApplicationPage
{
String[] Country = { "India","Japan",
"China","United states",
"Australia","Brazil",
"Singapore","Newzealand","South Africa"};
// Constructor
public MainPage()
{
InitializeComponent();
this.lpkCountry.ItemsSource = Country;
this.lp2.ItemsSource = Country;
}
}
}