Demka/Demka-2/ViewModels/MainViewModel.cs

using ReactiveUI;
using System.Windows.Input;

namespace Demka_2.ViewModels;

public class MainViewModel : ReactiveObject
{
    private string _password;
    private bool _isAdminMode;

    public string Password
    {
        get => _password;
        set => this.RaiseAndSetIfChanged(ref _password, value);
    }

    public bool IsAdminMode
    {
        get => _isAdminMode;
        set => this.RaiseAndSetIfChanged(ref _isAdminMode, value);
    }

    public ICommand LoginCommand => ReactiveCommand.Create(() =>
    {
        if (_password == "0000")
        {
            IsAdminMode = true;
        }
    });
}