Inheritance: ViewModelBase, IDisposable
 private void NotificationXtraForm_Load(object sender, EventArgs e)
 {
     viewModel = (NotificationViewModel)Program.Kernel.GetService(typeof(NotificationViewModel));
     BindToViewModel();
 }
 private void NotificationXtraForm_FormClosed(object sender, FormClosedEventArgs e)
 {
     viewModel.Dispose();
     viewModel = null;
 }