System.Core’s Story of Red Bits and Green Bits

After the initial release of the .NET Framework, the runtime, libraries, languages, and tools started to evolve at quite a different pace. This confirms the observations we made at the start of this chapter, with CLR 2.0 staying at the heart of the releases that immediately followed it. In particular, .NET 3.0 and .NET 3.5 leveraged the same runtime. At the same time, those releases brought service packs to lower layers of the system, including the CLR and BCL libraries. Figure 26.9 attempts to bring some structure to this picture.

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FIGURE 26.9 Versioning of runtime, libraries, and tools.

One challenge ...

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