//Переопределяем метод OnStartup
protected override async void OnStartup(StartupEventArgs e)
{
base.OnStartup(e);
MainWindowViewModel = new MainViewModel();
Internet = new InternetConnection();
IsHaveInternetConnection = Internet.CheckInternetConnection();
if (!IsHaveInternetConnection)
{
MainWindowViewModel.StatusValue = "Check your internet connection";
}
await displayRootRegistry.ShowModalPresendation(MainWindowViewModel);
}
