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

        public DcmAttributeTag GetAT(DicomTag tag)
        {
            DcmElement elem = GetElement(tag);
            if (elem is DcmAttributeTag)
                return elem as DcmAttributeTag;
            if (elem != null)
                throw new DicomDataException("Tried to access element with incorrect VR");
            return null;
        }