创建选取器的事件时xamarin中的未知(x:name)

<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="MyApp.MainPage">

    <StackLayout>
        <Picker x:Name="myPicker">
            <Picker.ItemsSource>
                <x:Array Type="{x:Type x:String}">
                    <x:String>Option 1</x:String>
                    <x:String>Option 2</x:String>
                    <x:String>Option 3</x:String>
                </x:Array>
            </Picker.ItemsSource>
        </Picker>

        <Button Text="Get Selected Option"
                Clicked="Button_Clicked" />
    </StackLayout>

</ContentPage>

private void Button_Clicked(object sender, EventArgs e)
{
    var selectedOption = myPicker.SelectedItem.ToString();
    // 进一步处理选中项
}