System.Collections.Specialized.OrderedDictionary

OrderedDictionary.ps1

# option 1
using namespace System.Collections.Specialized
$ordered = new-object OrderedDictionary

# option 2 
$ordered = new-object System.Collections.Specialized.OrderedDictionary

# members
$ordered | get-member

# usage
$ordered.add('first','zero')
$ordered.add('second','one')
$ordered.add('third','two')


$ordered
<#
  Name                           Value
  ----                           -----
  first                          zero
  second                         one
  third                          two
#>

$ordered[0]
<#
  zero
#>

$ordered['first']
<#
  zero
#>

$ordered['first'].Equals($ordered[0])
<#
  True
#>