Output single line of multi-line CimInstance - powershell

Question

I am trying to find a full solution to capture information from with Get-CimInstance Win32_NetworkAdapter and save it to a table on a server. Currently I am using the code around below:
$SerialNum = Get-CIMInstance WIN32_BIOS | SELECT -ExpandProperty SerialNumber
Get-CimInstance Win32_NetworkAdapter | Select-Object * |
Export-Csv S:\$SerialNum-NetAdptr.csv -Force -NoTypeInformation
Import-Csv S:\$SerialNum-NetAdptr.csv |
Select-Object *, #{Name='Serial';Expression={Get-CIMInstance WIN32_BIOS | Select-Object -ExpandProperty SerialNumber}} |
Export-Csv S:\$SerialNum-NetAdptrSerialized.csv -Force -NoTypeInformation
Remove-Item S:\$SerialNum-NetAdptr.csv
The issue I am having is computers with multiple NICs output multiple lines so outputting like:
$NetAdptrINF = Get-CIMInstance Win32_NetworkAdapter | Select-Object *
$objRecordSet.Fields.Item("ProductName").Value = ($NetAdptrINF.ProductName).ToString()
or
$objRecordSet.Fields.Item("ProductName").Value = $NetAdptrINF.ProductName
Saves something along the lines of: System[].object in the field. I have been looking at using foreach to print one line of each network adapter property at a time but have been unable to get anything that even remotely works. I am using PowerShell bundled in Windows 10 ADK.
$NetAdptrInf.ProductName outputs:
Microsoft Kernel Debug Network Adapter
Intel(R) Dual Band Wireless-AC 7260
Intel(R) Ethernet Connection I217-LM
Microsoft Wi-Fi Direct Virtual Adapter
Microsoft Hosted Network Virtual Adapter
Microsoft ISATAP Adapter
Microsoft Teredo Tunneling Adapter
Microsoft ISATAP Adapter
Microsoft ISATAP Adapter
VirtualBox Host-Only Ethernet Adapter
I need to be able to output one ProductName save it to a record along with other information collected from Win32_NetworkAdapter then move to the next one and repeat.
Thank you.

Answer 1

According the fact that $NetAdptrINF is evaluated as follow :
$NetAdptrINF = Get-CIMInstance Win32_NetworkAdapter
You can use the following to retreive a text list of product names :
($NetAdptrINF | % { $_.productname}) -join ','
Edited :
If you want to get a reccord by productname :
Get-CIMInstance Win32_NetworkAdapter | Select-Object DeviceId,Name,Productname,ServiceName,AdapterType