Fixed Variable returns different results for PowerShell V5.1 & V7.1

``

Steps to reproduce

Add-Type -TypeDefinition 'using System;
  using System.Management.Automation;
  public class FixedVariableNow : PSVariable
  {public FixedVariableNow() : base("Now", 0, ScopedItemOptions.ReadOnly | ScopedItemOptions.AllScope)
  {}
  public override object Value
  {get { return DateTime.Now; }}
}'
$ExecutionContext.SessionState.PSVariable.Set((New-Object -TypeName FixedVariableNow))
$Now.GetDateTimeFormats().count
Pause
$Now.GetDateTimeFormats()`

Run the code above on PowerShell V5.1 and PowerShell V7.1 and compare the output

Expected behavior

On Powershell V5.1 115 items are returned.

Actual behavior

on V7.1 only 30 items are returned.

Environment data

Name                           Value
----                           -----
PSVersion                      7.1.0
PSEdition                      Core
GitCommitId                    7.1.0
OS                             Microsoft Windows 10.0.19042
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

Name                           Value
----                           -----
PSVersion                      5.1.19041.610
PSEdition                      Desktop
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}
BuildVersion                   10.0.19041.610
CLRVersion                     4.0.30319.42000
WSManStackVersion              3.0
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1

[iSazonov]

You could run ([datetime]::now.GetDateTimeFormats()).count and compare - it is a question for .Net Rumtime repository if you want in depth explanations.

[msftbot[bot]]

This issue has been marked as answered and has not had any activity for 1 day. It has been closed for housekeeping purposes.