René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Fix individual commands that do not respect an explicit `$false` value passed to a switch parameter","articleBody":"### Prerequisites\n\n- [x] Write a descriptive title.\n- [x] Make sure you are able to repro it on the [latest released version](https://github.com/PowerShell/PowerShell/releases)\n- [x] Search the existing issues.\n- [x] Refer to the [FAQ](https://github.com/PowerShell/PowerShell/blob/master/docs/FAQ.md).\n- [x] Refer to [Differences between Windows PowerShell 5.1 and PowerShell](https://learn.microsoft.com/powershell/scripting/whats-new/differences-from-windows-powershell).\n\n### Steps to reproduce\n\n```powershell\n# The *presence* of the switch selects UseWindowsPowerShellParameterSet.\n# Irrespective of the switch *value*, CreateRunspacesForUseWindowsPowerShellParameterSet() is called.\n# This subverts reasonable user expectation. UseWindowsPowerShell was NOT requested, yet the command\n# ignores that request.\nNew-PSSession -UseWindowsPowerShell:$false\n\n# Likewise, this results in [datetime] output, despite it not being requested.\n$params = @{ Since = $false }\nGet-Uptime @params\n```\n\n### Context:\n\nThis is a continuation of the following issues:\n\n- https://github.com/PowerShell/PowerShell/issues/25015\n- https://github.com/PowerShell/PowerShell/issues/25027\n\nSummary:\n\n- The first issue discusses how `Get-Uptime -Since:$false` is not respected. That is, despite the explicit `$false` value, `Get-Uptime` behaves as if `-Since` or `-Since:$true` was specified.\n    - This behavior was deemed erroneous and the issue was labelled `Up-for-grabs`.\n- The second issue is a proposal by @mklement0 for a systematic change that would implicitly fix the `Get-Uptime` issue *and* other commands that exhibit the same problem. \n    - This proposal was rejected due to backwards compatibility concerns.\n- I encountered *at least* 10 commands shipped with PowerShell that exhibit the same problem when looking into the issue further. See [here](https://github.com/PowerShell/PowerShell/issues/25027#issuecomment-2661424666).\n- Per @iSazonov in [#25015](https://github.com/PowerShell/PowerShell/issues/25015#issuecomment-2661028506):\n\n\u003e Up-for-Grabs - we should fix all cmdlets in the repo if they implement a switch in wrong way.\n\n### List of commands to fix:\n\n- [x] `Get-Uptime -Since` #25015\n- [x] `New-Guid -Empty` #25276\n- [x] `Get-Random -Shuffle` #26456\n- [x] `Get-SecureRandom -Shuffle` #26460\n- [x] `Get-TimeZone -ListAvailable` #26462\n- [x] `New-PSSession -UseWindowsPowerShell` #26464\n- [x] `Split-Path -Qualifier`/`-NoQualifier`/`-Leaf`/`-IsAbsolute` (*not* `-Extension`/`-LeafBase`) #26470\n- [x] `Test-Connection -Repeat`/`-MtuSize`/`-Traceroute` #26475\n- [x] `Where-Object` (*all* non-common switch parameters) #26480\n- [ ] `ConvertTo-Csv -UseCulture:$false` #26513\n- [ ] `Export-Csv -UseCulture:$false` #26513\n- [ ] `ConvertFrom-Csv -UseCulture:$false`\n- [ ] `Import-Csv -UseCulture:$false`\n- [ ] `Get-Culture -ListAvailable:$false`\n- [ ] `Get-Location -Stack:$false`\n\n### Request\n\nFix each command listed above **_individually_**, so that explicitly passing a `$false` value to the specified switch parameter is respected.\n\n### Expected behavior\n\n`-Switch:$false` results in the same behavior as not passing `-Switch`.\n\n### Actual behavior\n\nFor the commands listed above, `-Switch:$false` results in the same behavior as `-Switch` or `-Switch:$true`.\n\n### Environment data\n\n```powershell\nName                           Value\n----                           -----\nPSVersion                      7.6.0-preview.3\nPSEdition                      Core\nGitCommitId                    7.6.0-preview.3\nOS                             Microsoft Windows 10.0.19045\nPlatform                       Win32NT\nPSCompatibleVersions           {1.0, 2.0, 3.0, 4.0, 5.0, 5.1…}\nPSRemotingProtocolVersion      2.3\nSerializationVersion           1.1.0.1\nWSManStackVersion              3.0\n```","author":{"url":"https://github.com/surfingoldelephant","@type":"Person","name":"surfingoldelephant"},"datePublished":"2025-03-26T16:55:03.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":10},"url":"https://github.com/25242/PowerShell/issues/25242"}