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Chapter 4. Core C# Programming Construct... > Understanding the Structure Type
4.4. Understanding the Structure Type
Now that you understand the role of enumeration types, let's examine the use of .NET structures (or simply structs). Structure types are well suited for modeling mathematical, geometrical, and other "atomic" entities in your application. A structure (like an enumeration) is a user-defined type; however, structures are not simply a collection of name/value pairs. Rather, structures are types that can contain any number of data fields and members that operate on these fields.
NOTE
If you have a background in OOP, you can think of a structure as a "lightweight class type," given that structures provide a way to define a type that supports encapsulation, but cannot be used to build a family of related types. When you need to build a family of related types through inheritance, you will need to make use of class types.
