public class EmployeesViewModel : ViewModelBase
{
    private IWindowService WinService;

    public EmployeesViewModel(IWindowService windowService, Owned<IDataContext> context)
    {
        WinService = windowService;        
///         Context = context;  /// -- Нахуа тогда вот это нужно, если ты его сразу диспозишь???
        
        context.Value.GetData()... // обращение к сервису, что-то делаем
        context.Dispose(); // OK
    }
}

interface IMessageHandler
{
    void Handle(Message message);
}

class MessagePump
{
    Func<Owned<IMessageHandler>> _handlerFactory;
    
    public MessagePump(Func<Owned<IMessageHandler>> handlerFactory)
    {
        _handlerFactory = handlerFactory;
    }
    
    public void Go()
    {
        while(true)
        {
            var message = NextMessage();
            
            using (var handler = _handlerFactory())
            {
                handler.Value.Handle(message);
            }
        } 
    }
}

private IWindowService WinService;

public class MainViewModel: ViewModelBase
{
    private IUnityContainer Container;

    public MainViewModel(IUnityContainer container)
    {
        Container = container;

        var ctx = Container.Resolve<IDataContext>();
        var history = ctx.GetHistory();
        ctx.Dispose();

        History = new ObservableCollection<History>(history);
    }

    public IIdentity Identity { get { return WindowsIdentity.GetCurrent(); } }

    private ObservableCollection<History> _history;
    public ObservableCollection<History> History
    {
        get
        {
            return _history;
        }
        set
        {
            _history = value;
            OnPropertyChanged(() => History);
        }
    }

    private ICommand _openReportCommand;
    public ICommand OpenReportCommand
    {
        get
        {
            if (_openReportCommand == null)
            {
                _openReportCommand = new RelayCommand(action => 
                {
                    var ctx = Container.Resolve<IDataContext>();
                    var employees = ctx.GetEmployees();
                    ctx.Dispose();

                    Container.Resolve<IWindowService>().OpenReport(employees); 
                });
            }

            return _openReportCommand;
        }
    }       
}

public class MainViewModel: ViewModelBase
{
    private IUnityContainer Container;

    public MainViewModel(IUnityContainer container)