The compiled .NET code is stored as an assembly.
The assembly stores:

IL code.

Assembly metadata (manifest).
Identity: Name, version and culture info.
Names of files within the assembly.
Types access data: private or otherwise.
Security permissions.

Type metadata.
Details of types, methods and properties within the assembly.

Resources: an assembly is therefore self-describing. It does not depend on external things like registry entries or type library files for reuse. ILDASM tool shipped with .NET gives an insight into the manifest and type metadata.