$a = New-Object PSObject -Property @{
    Name='New'
    Server = $null
    Database = $null
    UserName = $null
    Password = $null
}

$b = $a | Convertto-XML -NoTypeInformation

<?xml version="1.0"?>
<Objects>
  <Object>
    <Property Name="Password" />
    <Property Name="Name">New</Property>
    <Property Name="Server" />
    <Property Name="UserName" />
    <Property Name="Database" />
  </Object>
</Objects>

filter XmlProperty([String]$Property) {
    $_.SelectSingleNode("/Objects/Object/Property[@Name='$Property']").InnerText
}

$Name = $b | Xmlproperty Name
$Server = $b | XmlProperty Server
# etc...

function ConvertFrom-Xml($XML) {
    foreach ($Object in @($XML.Objects.Object)) {
        $PSObject = New-Object PSObject
        foreach ($Property in @($Object.Property)) {
            $PSObject | Add-Member NoteProperty $Property.Name $Property.InnerText
        }
        $PSObject
    }
}

ConvertFrom-Xml $b

function ConvertFrom-Xml {
<#
.SYNOPSIS
    Converts XML object to PSObject representation for further ConvertTo-Json transformation
.EXAMPLE
    # JSON->XML
    $xml = ConvertTo-Xml (get-content 1.json | ConvertFrom-Json) -Depth 4 -NoTypeInformation -as String
.EXAMPLE
    # XML->JSON
    ConvertFrom-Xml ([xml]($xml)).Objects.Object | ConvertTo-Json
#>
    param([System.Xml.XmlElement]$Object)

    if (($Object -ne $null) -and ($Object.Property -ne $null)) {
        $PSObject = New-Object PSObject

        foreach ($Property in @($Object.Property)) {
            if ($Property.Property.Name -like 'Property') {
                $PSObject | Add-Member NoteProperty $Property.Name ($Property.Property | % {ConvertFrom-Xml $_})
            } else {
                if ($Property.'#text' -ne $null) {
                    $PSObject | Add-Member NoteProperty $Property.Name $Property.'#text'
                } else {
                    if ($Property.Name -ne $null) {
                        $PSObject | Add-Member NoteProperty $Property.Name (ConvertFrom-Xml $Property)
                    }
                }
            }
        }
        $PSObject
    }
}

function xmlNodeToPsCustomObject ($node){
    $hash = @{}
    foreach($attribute in $node.attributes){
        $hash.$($attribute.name) = $attribute.Value
    }
    $childNodesList = $node.ChildNodes.LocalName
    foreach($childnode in $node.childnodes){
        if(!($childnode -eq $null)){
            if(($childNodesList | ?{$_ -eq $childnode.LocalName}) -gt 1){
                if(!($hash.$($childnode.LocalName))){
                    $hash.$($childnode.LocalName) += @()
                }
                if ($childnode.'#text' -ne $null) {
                    $hash.$($childnode.LocalName) += $childnode.'#text'
                }else{
                    $hash.$($childnode.LocalName) += xmlNodeToPsCustomObject($childnode)
                }
            }else{
                if ($childnode.'#text' -ne $null) {
                    $hash.$($childnode.LocalName) = $childnode.'#text'
                }else{
                    $hash.$($childnode.LocalName) = xmlNodeToPsCustomObject($childnode)
                }
            }
        }
    }
    return $hash | ConvertTo-PsCustomObjectFromHashtable
}

function ConvertTo-PsCustomObjectFromHashtable {
    param (
        [Parameter(
            Position = 0,
            Mandatory = $true,
            ValueFromPipeline = $true,
            ValueFromPipelineByPropertyName = $true
        )] [object[]]$hashtable
    );

    begin { $i = 0; }

    process {
        foreach ($myHashtable in $hashtable) {
            if ($myHashtable.GetType().Name -eq 'hashtable') {
                $output = New-Object -TypeName PsObject;
                Add-Member -InputObject $output -MemberType ScriptMethod -Name AddNote -Value {
                    Add-Member -InputObject $this -MemberType NoteProperty -Name $args[0] -Value $args[1];
                };
                $myHashtable.Keys | Sort-Object | % {
                    $output.AddNote($_, $myHashtable.$_);
                }
                $output
            } else {
                Write-Warning "Index $i is not of type [hashtable]";
            }
            $i += 1;
        }
    }
}