Hiperspace is an object storage technology that uses key addressable store to expand the quantity of information directly addressable by an application without duplication or explicit serialization. Elements that are not already in main memory are loaded transparently when needed, and released when they are no longer required.
The high-performance run-time is GPL open source (https://github.com/channell/Hiperspace) and packaged on Nuget (https://www.nuget.org/packages/Hiperspace.Rocks)
HiLang (https://www.nuget.org/packages/HiLang) generates Hiperspace classes for the most complex of data models