The class designer enables you to view the contents of your classes and their relationships. It can also be used as a productivity tool: you can create new classes and modify existing ones directly within the designer.
The class designer also supports refactoring. For example, you can rename elements within your classes or change their signature and the operation will use the compiler to update references accordingly. Figure 9.5 shows renaming a class directly within the diagram. Hitting enter after this rename will update references.
In the ...