jsonStreamReading.ps1

$stream = [System.IO.MemoryStream]::new([System.Text.Encoding]::UTF8.GetBytes(@'
[
  {
    "DomainName": "example1.com",
    "DomainNetBIOSName": "EXAMPLE1",
    "IDRanges": [
      { "RangeStart": 2000, "RangeEnd": 2999, "Attribute": "uidNumber", "AccountType": "Computer" },
      { "RangeStart": 3000, "RangeEnd": 3999, "Attribute": "uidNumber", "AccountType": "MSA" },
      { "RangeStart": 4000, "RangeEnd": 4999, "Attribute": "gidNumber", "AccountType": "Group" },
      { "RangeStart": 5000, "RangeEnd": 5999, "Attribute": "uidNumber", "AccountType": "AdmAccount", "IDGeneration": { "Type": "Calculation", "RefDomain": null } },
      { "RangeStart": 6000, "RangeEnd": 6999, "Attribute": "gidNumber", "AccountType": "BuiltInGroup" }
    ]
  },
  {
    "DomainName": "example2.com",
    "DomainNetBIOSName": "EXAMPLE2",
    "UIDGIDRanges": [
      { "RangeStart": 4000, "RangeEnd": 4999, "Attribute": "uidNumber", "AccountType": "Computer" },
      { "RangeStart": 5000, "RangeEnd": 5999, "Attribute": "uidNumber", "AccountType": "MSA" },
      { "RangeStart": 6000, "RangeEnd": 6999, "Attribute": "gidNumber", "AccountType": "Group" },
      { "RangeStart": 8000, "RangeEnd": 8999, "Attribute": "gidNumber", "AccountType": "BuiltInGroup" }
    ]
  }
]
'@))

class AnObject {
    [string] $DomainName
    [string] $DomainNetBIOSName
    [ordered[]] $UIDGIDRanges
    [ordered[]] $IDRanges
}

$serializer = [Newtonsoft.Json.JsonSerializer]::new()
$reader = [System.IO.StreamReader] $stream
$jsonreader = [Newtonsoft.Json.JsonTextReader] $reader

while($jsonreader.Read()) {
    if ($jsonreader.TokenType -eq [System.Text.Json.JsonTokenType]::StartObject) {
        $serializer.Deserialize[AnObject]($jsonreader) | Format-List
    }
}