public void AddItem(RadiosItemBase item) { if (item == null) { throw new ArgumentNullException(nameof(item)); } _items.Add(item); }
public void AddItem(RadiosItemBase item) { Guard.ArgumentNotNull(nameof(item), item); if (Fieldset != null) { throw new InvalidOperationException($"<{ItemTagName}> must be inside <{FieldsetTagName}>."); } _items.Add(item); }