Here is some other complimentary explication about Managed code:
Code that is executed by the CLR.
Code that targets the common language runtime, the foundation of the .NET Framework, is known as managed code.
Managed code supplies the metadata necessary for the CLR to provide services such as memory management, cross-language integration, code access security, and automatic lifetime control of objects. All code based on IL executes as managed code.
Code that executes under the CLI execution environment.