This chapter has provided a working knowledge of the key tools necessary to build applications for the .NET Framework. We also provided a detailed description of assemblies. Assemblies are one of the most significant differences introduced by the .NET Framework. Assemblies have an impact on almost every aspect of .NET and provide some sophisticated features to aid the packaging and deployment of applications. More advanced information about assemblies, including how to create an assembly that can be shared between applications, can be found in Appendix B.