function Get-ConfigurationDataItemValue {
    [CmdletBinding()]
    Param(
        [AllowNull()]
        $Item,
        [Parameter(Mandatory=$true)]
        [String]
        $KeyName
    )

    if(-not (Test-ConfigurationDataItemContainsKey -Item $Item -KeyName $KeyName)){
        return $null
    }

    if($Item -is [System.Collections.IDictionary]){
        return $Item[$KeyName]
    }

    return $Item.$KeyName
}