design.md

Learning objectives

• Know how to define const values.
• Know how to define readonly values.
• Know when to use const or readonly.
• know how to make a collection read-only
• understand the difference between the role of the readonly modifier and the use of read-only collections
• know how and when to use defensive copying

Out of scope

• readonly structs
• readonly properties
• ref readonly

Concepts

• constants: know how to define const values; know how to define readonly modifier know when to use const or readonly.
• readonly-collections: know how to make a collection read-only; understand the difference between the role of the readonly modifier and the use of readonly collections
• defensive-copying: know how and when to use defensive copying

Prerequisites

• classes: know how to define fields.
• basics: know how to define variables.
• object-initializers: part of the provided code
• arrays: referred to in about.md
• properties: understand how accessors are independent of each other
• dictionaries: understand the syntax and semantics of dictionaries (incl. in code)
• nested-types: understand the syntax of semantics nested types (incl. in code)