PowerShell Class Inheritance


Published on April 16, 2020

PowerShell classes support inheritance, which allows you to create a base class and methods that are then automatically available to inheritor classes.

Parent Class

class Rock {
  # Properties
  [String]$Size
  [Float]$Weight
  [Bool]$IsShiny
}

Inheritor class

Inheritance is signaled by : ParentClassName in the class signature. The inheritor will be able to access properties and methods of its parent.

class Pebble : Rock {
  [Int]$SmoothnessIndex

  [Bool]IsSmoothAndHeavy() {
    If ( $This.Weight -gt 5 -and $This.SmoothnessIndex -gt 0.87 ) {
      Return $True;
    }
    else {
      Return $False;
    }
  }

  # Constructor 
  Pebble( [String]$Size, [Float]$Weight, [Bool]$IsShiny, [Int]$SmoothnessIndex ) {
    $This.Size = $Size
    $This.Weight = $Weight
    $This.IsShiny = $IsShiny
    $This.SmoothnessIndex = $SmoothnessIndex
  }
}

$Pebster = [Pebble]::new("Large", 1.01, $False, 2)
$Pebster.IsSmoothAndHeavy() #False