new public void Insert(int index, Index val)
{
if (this._entity != null)
{
val.SetEntity(this._entity);
}
if ( this.Contains(val) )
{
this.Remove(val);
}
this.Insert(index, val);
}
new public int Add(Index val)
{
if (this._entity != null)
{
val.SetEntity(this._entity);
}
if ( !this.Contains(val) )
{
return base.Add(val);
}
return -1;
}