... Defining and Using a Class In C#, you use the class keyword, a name, and a pair of curly braces to define a new class. The data and methods of the class occur in the ... Expressions,” and how to write methods in Chapter 3, “Writing Methods and Applying Scope”; in fact, there's almost no new syntax here. Using the Circle class is similar to using other types ... for variables of class types is allocated and managed by the common language runtime—this will be discussed further in Chapter 8, Understanding Values and References.” For now, just ...