public int IndexOf(ProductAttachement entity)
 {
     return base.IndexOf(entity);
 }
 public bool Contains(ProductAttachement entity)
 {
     return base.Contains(entity);
 }
 public bool Remove(ProductAttachement entity)
 {
     return base.Remove(entity);
 }
 public void Add(ProductAttachement entity)
 {
     base.Add(entity);
 }
 public void Insert(int index, ProductAttachement entity)
 {
     base.Insert(index, entity);
 }