Module as object

ModuleAsObject.ps1

function New-Dog {
    param(
        [Parameter(Mandatory=$true)]
        [string]$Name,
        [Parameter(Mandatory=$false)]
        [ValidateSet('small', 'medium','large', $null)]
        [string]$size,
        [Parameter(Mandatory=$false)]
        [string]$color
    )
    $this = New-Module -Argumentlist @($name,$size,$color) -AsCustomObject -ScriptBlock {
        param(
            [Parameter(Mandatory=$true)]
            [string]$Name,
            [Parameter(Mandatory=$false)]
            [ValidateSet('small', 'medium','large', $null)]
            [string]$size,
            [Parameter(Mandatory=$false)]
            [string]$color
        )
        function Pee {
            "A warm refreshing pee trickles out of {0}" -f $Name
        }
        
        Export-ModuleMember -Function Pee -Variable Name, Size, Color
    }
    
    $this.PSTypeNames.Insert(0,'dog') 
    $this
}

$chenil = New-Object System.Collections.ArrayList
[void]$chenil.Add((New-Dog 'Médor'))
[void]$chenil.Add((New-Dog 'Fido'))
[void]$chenil.Add((New-Dog -Name 'Sultan' -size small))

$chenil