Dicom.Data.DcmDataset.AddItem C# (CSharp) Method

        public void AddItem(DcmItem item)
        {
            _items.Remove(item.Tag);
            _items.Add(item.Tag, item);
            item.Endian = InternalTransferSyntax.Endian;
        }

 public DcmDataset Clone()
 {
     DcmDataset dataset = new DcmDataset(StreamPosition, StreamLength, InternalTransferSyntax);
     foreach (DcmItem item in Elements) {
         dataset.AddItem(item.Clone());
     }
     dataset.UserState = UserState;
     return dataset;
 }