/// <summary>
 /// remove DomainConfigEntry from indexers
 /// </summary>
 /// <param name="item">the DomainConfigEntry to be removed</param>
 public void Remove(DomainConfigEntry item)
 {
     base.BaseRemove(GetElementKey(item));
 }
 /// <summary>
 /// Add DomainConfigEntry element to the ConfigurationElementCollection
 /// </summary>
 /// <param name="item">the DomainConfigEntry to be added</param>
 public void Add(DomainConfigEntry item)
 {
     base.BaseAdd(item);
 }