Xamarin.Forms - 在运行时在深色和浅色主题之间切换

1 - 是否可以使用 2.3.x 版本中引入的 Xamarin.Forms 主题（下面的链接）在浅色和深色主题之间切换。有什么解决办法吗？https://developer.xamarin.com/guides/xamarin-forms/user-interface/themes/ https://developer.xamarin.com/guides/xamarin-forms/user-interface/themes/

2 - 我还看到此版本自推出以来一直处于预览状态。是否存在任何问题，我们无法在生产中使用它？

接受的答案不符合Microsoft 演示的约定 https://learn.microsoft.com/en-us/xamarin/xamarin-forms/user-interface/themes/.

假设您已经安装了这些软件包，Xamarin.Forms.Themes.Base https://www.nuget.org/packages/Xamarin.Forms.Theme.Base/, Xamarin.Forms.Themes.Light https://www.nuget.org/packages/Xamarin.Forms.Theme.Light/1.0.0.43-pre1, and Xamarin.Forms.Themes.Dark https://www.nuget.org/packages/Xamarin.Forms.Theme.Dark/1.0.0.43-pre1， 和你的App.xaml好像，

<?xml version="1.0" encoding="utf-8" ?>
<Application 
    xmlns="http://xamarin.com/schemas/2014/forms"
    xmlns:light="clr-namespace:Xamarin.Forms.Themes;assembly=Xamarin.Forms.Theme.Light"
    xmlns:dark="clr-namespace:Xamarin.Forms.Themes;assembly=Xamarin.Forms.Theme.Dark"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    x:Class="MyNamespace.MyApp">
    <Application.Resources>
        <ResourceDictionary MergedWith="light:LightThemeResources">
            ...
        </ResourceDictionary>
    </Application.Resources>
</Application>

您可以使用以下命令在运行时更改主题：

public enum Themes
{
    Dark,
    Light
}

var origin = App.Current.Resources;
switch (theme)
{
    case Themes.Dark:
        origin.MergedWith = typeof(DarkThemeResources);
        break;
    case Themes.Light:
        origin.MergedWith = typeof(LightThemeResources);
        break;
}