求助：.NET MAUI CommunityToolkit Popup V2.0无法正常运行

将应用更新至CommunityToolkit.Maui v12.0.0后，新版Popup功能无法正常工作。已安装要求的.NET SDK 9.0.301，为排查问题创建了一个匹配文档示例的小型项目，但遇到编译错误。

项目代码 #

MainPage.xaml #

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:local="clr-namespace:MyProject"
             x:Class="MyProject.MainPage">
    <ContentPage.BindingContext>
        <local:MainViewModel />
    </ContentPage.BindingContext>
    <ScrollView>
        <VerticalStackLayout
            Padding="30,0"
            Spacing="25">
            <Image
                Source="dotnet_bot.png"
                HeightRequest="185"
                Aspect="AspectFit"
                SemanticProperties.Description="dot net bot in a hovercraft number nine" />

            <Label
                Text="Hello, World!"
                Style="{StaticResource Headline}"
                SemanticProperties.HeadingLevel="Level1" />

            <Label
                Text="Welcome to &#10;.NET Multi-platform App UI"
                Style="{StaticResource SubHeadline}"
                SemanticProperties.HeadingLevel="Level2"
                SemanticProperties.Description="Welcome to dot net Multi platform App U I" />

            <Button
                x:Name="CounterBtn"
                Text="Click me"
                SemanticProperties.Hint="Counts the number of times you click"
                Command="{Binding CounterClickedCommand}"
                HorizontalOptions="Fill" />
        </VerticalStackLayout>
    </ScrollView>
</ContentPage>

MainViewModel.cs #

using CommunityToolkit.Maui.Views;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
namespace MyProject
{
    public partial class MainViewModel : ObservableObject
    {
        public MainViewModel()
        {
        }

        [RelayCommand]
        public async Task ButtonClicked()
        {
            var popup = new SimplePopup();

            // Ensure PopupOptions and ShowPopupAsync are correctly referenced
            await this.ShowPopupAsync(popup,PopupOptions.Empty);
        }
    }
}

SimplePopup.xaml #

<ContentView xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="MyProject.SimplePopup"
             Padding="10">

    <Label Text="This is a very important message!" />
</ContentView>

MauiProgram.cs #

using CommunityToolkit.Maui;
using Microsoft.Extensions.Logging;

namespace MyProject
{
    public static class MauiProgram
    {
        public static MauiApp CreateMauiApp()
        {
            var builder = MauiApp.CreateBuilder();
            builder
                .UseMauiApp<App>()
                .UseMauiCommunityToolkit()
                .ConfigureFonts(fonts =>
                {
                    fonts.AddFont("OpenSans-Regular.ttf", "OpenSansRegular");
                    fonts.AddFont("OpenSans-Semibold.ttf", "OpenSansSemibold");
                });

#if DEBUG
            builder.Logging.AddDebug();
#endif

            return builder.Build();
        }
    }
}

遇到的错误 #

• using CommunityToolkit.Maui.Views; 显示为灰色（未被实际使用）
• await this.ShowPopupAsync(popup,PopupOptions.Empty); 行出现红色下划线，错误提示：

'MainViewModel' does not contain a definition for 'ShowPopupAsync' 
and no accessible extension method 'ShowPopupAsync' accepting a 
first argument of type 'MainViewModel' could be found 
(are you missing a using directive or an assembly reference?)

请问有人成功使用Popup V2.0了吗？如果有的话，请指出我的示例中存在的问题。

内容的提问来源于stack exchange，提问作者user3017691