private void FirearmCreate_Click(object sender, RoutedEventArgs e)
 {
     if (TextBoxFirearmName.Text != "" && TextBoxMuzzleVelocity.Text != "" && ComboBoxAmmunition.SelectedItem != null && ComboBoxFirearmType.SelectedItem != null)
     {
         FirearmType currentFirearmType = ComboBoxFirearmType.SelectedItem as FirearmType;
         Ammunition  currentAmmunition  = ComboBoxAmmunition.SelectedItem as Ammunition;
         _create.AddFirearm(TextBoxFirearmName.Text, Int32.Parse(TextBoxMuzzleVelocity.Text), currentFirearmType.FirearmTypeID, currentAmmunition.AmmunitionID);
         PopulateControls();
     }
 }