Mastering PowerShell Scripting - Fourth Edition

19

Classes and Enumerations

PowerShell 5 introduced support for creating classes and enumerations within PowerShell directly. Prior to this, you had to import classes from an assembly written in a language such as C# or create them dynamically, which is complex and beyond the scope of this chapter.

Classes and enumerations have only changed a little in PowerShell 6 and 7. There are numerous enhancement issues open in the PowerShell project on GitHub, but these are slow to make their way into PowerShell. Examples include support for writing interfaces and the ability to define getters and setters for properties.

This chapter explores the following topics:

• Defining an enumeration
• Creating a class
• Argument transformation attribute classes
• Validation ...