DemoService/ServiceWindow.axaml.cs

using Avalonia;
using Avalonia.Controls;
using Avalonia.Markup.Xaml;

namespace DemoService;

public partial class ServiceWindow : Window
{
    private readonly bool Admin;
    public ServiceWindow()
    {
        InitializeComponent();
    }
    public ServiceWindow(bool admin)
    {
        InitializeComponent();
        Admin = admin;
    }
}