$variable.PSObject.Properties not containing my property

Hi,

I’ve created a PSCustomObject by doing the following

$productList = foreach ($p in 1..5)
{
    [PSCustomObject]@{
        SerialNumber = "CND$(Get-Random -Minimum 100 -Maximum 999)W$(Get-Random -Maximum 9)M"
        PartNumber = "D$(Get-Random -Maximum 5)H$(Get-Random -Minimum 10 -Maximum 99)AV"
    }
}

As far as I am aware I am supposed to be able to now see my properties if I go

$productList.psobject.properties.name

or access it by doing like

$productList.psobject.Properties['SerialNumber']

.

I only see the following properties if I select all the names

Count
Length
LongLength
Rank
SyncRoot
IsReadOnly
IsFixedSize
IsSynchronized

And I get nothing back when I try to access it.

I can do

PS C:\WINDOWS\system32> $productList | Get-Member -MemberType NoteProperty, Properties


   TypeName: System.Management.Automation.PSCustomObject

Name         MemberType   Definition                   
----         ----------   ----------                   
PartNumber   NoteProperty string PartNumber=D1H57AV    
SerialNumber NoteProperty string SerialNumber=CND254W2M

and I can see the property being listed there and all is fine.

I am curious to why it does not work via psobject, anyone can help to explain it to me?

Thanks in advance,

//Tony

It’s because you are requesting the properties of the array of PSCustomObjects that you created and not the properties of an object in that array.

PS E:\> $productList = foreach ($p in 1..5)
>> {
>>     [PSCustomObject]@{
>>         SerialNumber = "CND$(Get-Random -Minimum 100 -Maximum 999)W$(Get-Random -Maximum 9)M"
>>         PartNumber = "D$(Get-Random -Maximum 5)H$(Get-Random -Minimum 10 -Maximum 99)AV"
>>     }
>> }
PS E:\> $productList.psobject.properties.name
Count
Length
LongLength
Rank
SyncRoot
IsReadOnly
IsFixedSize
IsSynchronized
PS E:\> $productList[0].psobject.properties.name
SerialNumber
PartNumber
PS E:\>

So the “.PSObject” part of the statement is actually referencing the Object[] and not the PSCustomObject that you created.

PS E:\> $productlist.gettype()

IsPublic IsSerial Name                                     BaseType
-------- -------- ----                                     --------
True     True     Object[]                                 System.Array

When you put Get-Member in the pipeline, it is executing for each object that is passed to it, which would be each individual PSCustomObject in the array you created. That’s why it shows you the PSCust

omObject type and the custom properties you set.

Thank you sir!

Not sure how I could’ve missed it. It is now so obvious when you pointed it out.

Best regards