Properties are just methods

Properties.ps1

#Backing methods
[System.Collections.ArrayList].GetMethods() | Where Name -like 'get_*' | Select Name
[System.Collections.ArrayList].GetMethods() | Where Name -like 'set_*' | Select Name

$ArrayList = New-Object System.Collections.ArrayList 
$ArrayList.Add(1) | Out-Null
$ArrayList.Add(2) | Out-Null

#Indexer (parameterized property)
$ArrayList[1]

#Underlying method
$ArrayList.get_Item(1)

#Underlying method
$ArrayList.set_Item(1, 10)

#Indexer (parameterized property)
$ArrayList[1]

#Property
$ArrayList.Count

#Underlying method
$ArrayList.get_Count()