public async void Execute(object parameter)
{
try
{
IEnumerable <Employee> employees = await _apiHelper.GetAllEmployees();
_employeeListViewModel.Employees = new System.Collections.ObjectModel.ObservableCollection <Employee>(employees);
}
catch (Exception ex)
{
_employeeListViewModel.Display = System.Windows.Visibility.Visible;
_employeeListViewModel.MessageBrush = Brushes.Red;
_employeeListViewModel.Message = ex.Message;
}
}