By exploring the entry point of a program, we put ourselves in a position to experiment with language essentials in this and the chapters to come. In this chapter, you learned a good deal about the role types play in programs and what the built-in types are. Concepts such as types, objects, instances, variables, assignment, arrays, and nullable value types should hold no secrets for you anymore.

In the next chapter, we continue on our merry way through the C# language by starting to write code that really does something. Expressions will be used to compute values, and statements will drive the program’s execution through mechanisms such as control flow.

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