protected void ShowAddContactWindowExecuted()
{
var addContactWindow = new ContactEditorWindow();
addContactWindow.Show();
}
private void ShowContactEditorExecuted()
{
var contactVm = new ContactEditorViewModel(Model);
var contact = new ContactEditorWindow();
contact.DataContext = contactVm;
contactVm.Rejected += contact.Close;
contactVm.Saved += contact.Close;
contact.Show();
}