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

        public bool Contains(DicomTag tag)
        {
            return _items.ContainsKey(tag);
        }

 public bool Match(DcmDataset dataset)
 {
     if (dataset.Contains(_tag)) {
         string value = dataset.GetValueString(_tag);
         return value.Contains(_value);
     }
     return false;
 }