我有一个对话服务

using RControl.Client.Abstractions;
using System;
using System.Windows;

namespace RControl.Client.Services;

public class DialogService : IDialogService
{
    public void ShowDialog<TViewModel>(TViewModel viewModel)
    {
        var window = new Window
        {
            Content = Activator.CreateInstance(ViewLocator.GetViewType(typeof(TViewModel))),
            DataContext = viewModel,
        };

        window.ShowDialog();
    }
}

另见视图定位器

using System;
using System.Linq;
using System.Reflection;

namespace RControl.Client;

public static class ViewLocator
{
    private const string ViewSuffix = "View";
    private const string ViewModelSuffix = "ViewModel";

    public static Type GetViewType(Type viewModelType)
    {
        var viewName = viewModelType.Name.Replace(ViewModelSuffix, string.Empty) + ViewSuffix;
        var viewType = Assembly.GetExecutingAssembly().GetTypes().FirstOrDefault(t => t.Name == viewName);

        return viewType ?? throw new ArgumentException($"View not found for {viewModelType.Name}.");
    }
}

但是当以这种方式使用该服务时

[RelayCommand]
private void About()
{
    var viewModel = new AboutViewModel();
    _dialogService.ShowDialog(viewModel);
}

抛出异常：系统操作无效异常："Window对象必须是树的根。不能将Window对象添加为Visual的子对象。"
如何实现与相同的行为：

var window = new AboutView();
window.ShowDialog();