7.8. Summary
Data types form a fundamental building block of a programming language. Whereas Java provides only a handful of data types (classes, interfaces, and primitives), C# has a rich set of value types and reference types. Both should be used in C# programming. You are encouraged not to try to model everything as a class and thereby miss out on some of the optimizations, such as structs, that are built into C# data types. The following key conclusions can be drawn from this chapter:
C# data types can be value types, reference types, or pointer types. Value types can be struct or enum. A struct can be user-defined or built-in. Both structs and enums are lightweight constructs that do not have an equivalent in Java.
C# built-in value types ...
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