private void OpenButton_Click(object sender, RoutedEventArgs e)
        {
            var window = new WorkerWindow(m_serviceClient, m_company, EmployeesComboBox.SelectedItem as Employee, false);

            bool?dialogResult = window.ShowDialog();

            if (dialogResult == null || dialogResult.Value != true)
            {
                return;
            }

            EmployeesComboBox.ItemsSource = m_serviceClient.GetAllEmployeesPerComapny(m_company);
        }
        private void AddButton_Click(object sender, RoutedEventArgs e)
        {
            var window = new WorkerWindow(m_serviceClient, m_company,
                                          new Employee {
                Company_id = m_company.Id, Starting_date = DateTime.Now
            }, true);

            bool?dialogResult = window.ShowDialog();

            if (dialogResult == null || dialogResult.Value != true)
            {
                return;
            }

            EmployeesComboBox.ItemsSource = m_serviceClient.GetAllEmployeesPerComapny(m_company);
        }