xamarin数据平台选择器:无效的XAML名称

<!-- 错误的拼写 -->
<Label Text="Hello World" />

<!-- 正确的拼写 -->
<Label Text="Hello World" />

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="YourNamespace.MainPage">
    <Label Text="Hello World" />
</ContentPage>

// 自定义控件的代码
[assembly: ExportRenderer(typeof(CustomLabel), typeof(CustomLabelRenderer))]
namespace YourNamespace
{
    public class CustomLabel : Label { }
}

<!-- XAML 文件 -->
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:local="clr-namespace:YourNamespace"
             x:Class="YourNamespace.MainPage">
    <local:CustomLabel Text="Hello World" />
</ContentPage>

<Picker Title="Select a fruit">
    <Picker.Items>
        <x:String>Apple</x:String>
        <x:String>Banana</x:String>
        <x:String>Orange</x:String>
    </Picker.Items>
</Picker>