如何在xamarin表单中设置2行的列表视图描述？

<DataTemplate>
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="*" />
            <RowDefinition Height="*" />
        </Grid.RowDefinitions>
        <Label Grid.Row="0" Text="{Binding Line1}" />
        <Label Grid.Row="1" Text="{Binding Line2}" />
    </Grid>
</DataTemplate>

<ListView x:Name="ListView">
    <ListView.ItemTemplate>
        <DataTemplate>
            <Grid>
                <Grid.RowDefinitions>
                    <RowDefinition Height="*" />
                    <RowDefinition Height="*" />
                </Grid.RowDefinitions>
                <Label Grid.Row="0" Text="{Binding Line1}" />
                <Label Grid.Row="1" Text="{Binding Line2}" />
            </Grid>
        </DataTemplate>
    </ListView.ItemTemplate>
</ListView>

ObservableCollection<Item> Items = new ObservableCollection<Item>
{
    new Item { Line1 = "Item 1 Line 1", Line2 = "Item 1 Line 2" },
    new Item { Line1 = "Item 2 Line 1", Line2 = "Item 2 Line 2" },
    // 添加更多的列表项...
};

ListView.ItemsSource = Items;