private Int32 getWorkingCopyTupleCount(DatasetVersion datasetVersion)
{
List<Int64> versionIds = getPreviousVersionIds(datasetVersion);
Int32 tupleCount = (versionIds == null || versionIds.Count() <= 0) ? 0 : DataTupleRepo.Query(p => versionIds.Contains(((DataTuple)p).DatasetVersion.Id)).Select(p => p.Id).Count();
return (tupleCount);
}