In version 2.* this library has been broken up into a number of smaller components. RT.Util itself only has components which directly depend on some Windows / Framework functionality. The majority of the code is now in RT.Util.Core, targeting netstandard2.0. If you can't find a type you used in RT.Util v1, it's almost certainly in one of the packages below.
Wad of stuff.
Wad of stuff that isn't compatible with .NET Core, or is dependent on something that isn't compatible.
Serialize classes to/from JSON/XML/binary/your own format. The feature set is optimized for maintaining backwards compatibility of serialized files as the classes evolve, in particular when used for application settings / configuration.
RT.Serialization implements core logic and is format-agnostic. Specific formats are implemented by the following libraries:
Execute tasks after project build to validate invariants and fail the build if violated.
A JSON parser written before Json.NET became good. Slower than Json.NET. API aimed at stringent access.
Legacy code from RT.Util. Preserved only to make it possible to compile ancient unmaintained private projects.