public MeasurementsViewModel(MainViewModel mainViewModel)
 {
     MainViewModel = mainViewModel;
     Measurements = new ObservableCollection<MeasurementViewModel>();
     SelectedMeasurement = null;
     PropertyChanged += OnPropertyChanged;
 }
 public MainWindow()
 {
     InitializeComponent();
     var model = new MainViewModel();
     this.DataContext = model;
 }