Dictionary.ps1

function Dictionary
{
    param([Type[]]$Type, [Hashtable]$Hashtable)

    $KeyType = $Type[0]
    $ValueType = $Type[1]

    $Dictionary = New-Object -TypeName "System.Collections.Generic.Dictionary[$KeyType,$ValueType]"

    $Hashtable.GetEnumerator() | % {
        $Dictionary.Add($_.Key, $_.Value)
    }

    $Dictionary
}

Dictionary System.DayOfWeek, String @{
    'Saturday' = "Caturday";
    'Sunday' = "Funday";
}