From 41e21d913487f936c3dac596971cae6aa2fee3bc Mon Sep 17 00:00:00 2001
From: KirtiRamchandani <kirtiar15502@gmail.com>
Date: Mon, 25 May 2026 00:21:52 +0530
Subject: [PATCH] Update New-Item unknown type message

---
 .../resources/FileSystemProviderStrings.resx          |  2 +-
 .../FileSystem.Tests.ps1                              | 11 +++++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/System.Management.Automation/resources/FileSystemProviderStrings.resx b/src/System.Management.Automation/resources/FileSystemProviderStrings.resx
index 360c2eceb7e..1314f6a3a0c 100644
--- a/src/System.Management.Automation/resources/FileSystemProviderStrings.resx
+++ b/src/System.Management.Automation/resources/FileSystemProviderStrings.resx
@@ -205,7 +205,7 @@
     <value>Directory {0} cannot be removed because it is not empty.</value>
   </data>
   <data name="UnknownType" xml:space="preserve">
-    <value>The type is not a known type for the file system. Only "file","directory" or "symboliclink" can be specified.</value>
+    <value>The type is not a known type for the file system. Only "file", "directory", "symboliclink", "junction", or "hardlink" can be specified.</value>
   </data>
   <data name="PathOutSideBasePath" xml:space="preserve">
     <value>Cannot process the path because the specified path refers to an item that is outside the basePath.</value>
diff --git a/test/powershell/Modules/Microsoft.PowerShell.Management/FileSystem.Tests.ps1 b/test/powershell/Modules/Microsoft.PowerShell.Management/FileSystem.Tests.ps1
index 3899ace7e3b..113abd3bcc6 100644
--- a/test/powershell/Modules/Microsoft.PowerShell.Management/FileSystem.Tests.ps1
+++ b/test/powershell/Modules/Microsoft.PowerShell.Management/FileSystem.Tests.ps1
@@ -79,6 +79,17 @@ Describe "Basic FileSystem Provider Tests" -Tags "CI" {
             $newFile.Name | Should -BeExactly $newTestFile
         }
 
+        It "New-Item reports all supported file system item types for an unknown item type" {
+            $errorRecord = {
+                New-Item -Path (Join-Path $TestDrive "unknown-type") -ItemType UnknownType -ErrorAction Stop
+            } | Should -Throw -PassThru
+
+            $errorRecord.FullyQualifiedErrorId | Should -BeExactly "Argument,Microsoft.PowerShell.Commands.NewItemCommand"
+            foreach ($itemType in '"file"', '"directory"', '"symboliclink"', '"junction"', '"hardlink"') {
+                $errorRecord.Exception.Message | Should -Match ([regex]::Escape($itemType))
+            }
+        }
+
         It "Verify Remove-Item for directory" {
             $existsBefore = Test-Path $testDir
             Remove-Item -Path $testDir -Recurse -Force