Add compatibility profiles for Windows 11 with PowerShell 5.1, 7.4, 7.5 and 7.6

PSCompatibilityCollector/Microsoft.PowerShell.CrossCompatibility/Collection/PlatformInformationCollector.cs

@@ -159,9 +159,10 @@ public DotnetData GetDotNetData()
             return new DotnetData()
             {
                 ClrVersion = Environment.Version, // TODO: This might be better recording the last part of RuntimeInformation.FrameworkDescription
-                Runtime = RuntimeInformation.FrameworkDescription.StartsWith(".NET Core")
-                    ? DotnetRuntime.Core
-                    : DotnetRuntime.Framework,
+                // .NET 5 and later report ".NET <version>" rather than ".NET Core <version>"
+                Runtime = RuntimeInformation.FrameworkDescription.StartsWith(".NET Framework")
+                    ? DotnetRuntime.Framework
+                    : DotnetRuntime.Core,
             };
 #endif
         }

PSCompatibilityCollector/Microsoft.PowerShell.CrossCompatibility/Collection/PowerShellDataCollector.cs

@@ -173,27 +173,8 @@ public Tuple<string, Version, ModuleData> LoadAndGetModuleData(PSModuleInfo modu
         {
             try
             {
-                PSModuleInfo importedModule = _pwsh.AddCommand(s_ipmoInfo)
-                    .AddParameter("ModuleInfo", module)
-                    .AddParameter("PassThru")
-                    .AddParameter("ErrorAction", "Stop")
-                    .InvokeAndClear<PSModuleInfo>()
-                    .FirstOrDefault();
-
-                if (importedModule == null)
-                {
-                    error = null;
-                    return null;
-                }
-
-                Tuple<string, Version, ModuleData> moduleData = GetSingleModuleData(importedModule);
-
-                _pwsh.AddCommand(s_rmoInfo)
-                    .AddParameter("ModuleInfo", importedModule)
-                    .InvokeAndClear();
-
                 error = null;
-                return moduleData;
+                return ImportAndGetModuleData(module);
             }
             catch (RuntimeException e)
             {
@@ -207,6 +188,18 @@ public Tuple<string, Version, ModuleData> LoadAndGetModuleData(PSModuleInfo modu
                             .AddParameter("TypeName", typeDataName)
                             .InvokeAndClear();
                    }
+
+                   // Retry now that the conflicting type data is gone.
+                   // A new runspace would load the same default type data again (e.g. for Microsoft.PowerShell.Diagnostics on PowerShell 7).
+                   try
+                   {
+                       error = null;
+                       return ImportAndGetModuleData(module);
+                   }
+                   catch (RuntimeException)
+                   {
+                       // Fall back to a new runspace below
+                   }
                 }
 
                 // Attempt to load the module in a new runspace instead
@@ -234,6 +227,29 @@ public Tuple<string, Version, ModuleData> LoadAndGetModuleData(PSModuleInfo modu
             }
         }
 
+        private Tuple<string, Version, ModuleData> ImportAndGetModuleData(PSModuleInfo module)
+        {
+            PSModuleInfo importedModule = _pwsh.AddCommand(s_ipmoInfo)
+                .AddParameter("ModuleInfo", module)
+                .AddParameter("PassThru")
+                .AddParameter("ErrorAction", "Stop")
+                .InvokeAndClear<PSModuleInfo>()
+                .FirstOrDefault();
+
+            if (importedModule == null)
+            {
+                return null;
+            }
+
+            Tuple<string, Version, ModuleData> moduleData = GetSingleModuleData(importedModule);
+
+            _pwsh.AddCommand(s_rmoInfo)
+                .AddParameter("ModuleInfo", importedModule)
+                .InvokeAndClear();
+
+            return moduleData;
+        }
+
         /// <summary>
         /// Get the module data for a single loaded module.
         /// Unloaded modules may only present partial data.

PSCompatibilityCollector/Tests/Collection.Tests.ps1

@@ -0,0 +1,28 @@
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License.
+
+Describe "Platform data collection" {
+    It "Reports the .NET runtime as Core on PowerShell 6 and later" -Skip:($PSVersionTable.PSVersion.Major -lt 6) {
+        (Get-PSCompatibilityPlatformData).Dotnet.Runtime | Should -Be 'Core'
+    }
+}
+
+Describe "Module data collection" {
+    It "Collects Microsoft.PowerShell.Diagnostics commands despite its type data already being loaded" -Skip:(-not $IsWindows -or $PSVersionTable.PSVersion.Major -lt 7) {
+        $pwsh = [powershell]::Create()
+        try {
+            $psVersion = [Microsoft.PowerShell.CrossCompatibility.PowerShellVersion]::Create($PSVersionTable.PSVersion)
+            $collector = [Microsoft.PowerShell.CrossCompatibility.Collection.PowerShellDataCollector+Builder]::new().Build($pwsh, $psVersion)
+            $module = Get-Module -ListAvailable -Name (Join-Path $PSHOME 'Modules/Microsoft.PowerShell.Diagnostics')
+
+            $err = $null
+            $moduleData = $collector.LoadAndGetModuleData($module, [ref]$err)
+
+            $err | Should -BeNullOrEmpty
+            $moduleData.Item3.Cmdlets.Keys | Should -Contain 'Get-WinEvent'
+        }
+        finally {
+            $pwsh.Dispose()
+        }
+    }
+}

Tests/Rules/UseCompatibleCommands.Tests.ps1

@@ -17,6 +17,10 @@ BeforeDiscovery {
     $Win10_7_profile = 'win-4_x64_10.0.18362.0_7.0.0_x64_3.1.2_core'
     $Ubuntu1804_6_2_profile = 'ubuntu_x64_18.04_6.2.4_x64_4.0.30319.42000_core'
     $Ubuntu1804_7_profile = 'ubuntu_x64_18.04_7.0.0_x64_3.1.2_core'
+    $Win11_5_profile = 'win-4_x64_10.0.26200.0_5.1.26100.9711_x64_4.0.30319.42000_framework'
+    $Win11_7_4_profile = 'win-4_x64_10.0.26200.0_7.4.21_x64_8.0.32_core'
+    $Win11_7_5_profile = 'win-4_x64_10.0.26200.0_7.5.12_x64_9.0.21_core'
+    $Win11_7_6_profile = 'win-4_x64_10.0.26200.0_7.6.7_x64_10.0.13_core'
 
     $CompatibilityTestCases = @(
         @{ Target = $Srv2012_3_profile; Script = 'Write-Information "Information"'; Commands = @("Write-Information"); Version = "3.0"; OS = "Windows"; ProblemCount = 1 }
@@ -181,6 +185,16 @@ BeforeDiscovery {
         @{ Target = $Srv2019_7_profile; Script = 'Get-EventLog -Newest 5 -LogName "Application"'; Commands = @("Get-EventLog"); Version = "7.0"; OS = "Windows"; ProblemCount = 1 }
         @{ Target = $Srv2019_7_profile; Script = 'Get-HotFix -Description "Security*" -ComputerName "Server01", "Server02" -Cred "Server01\admin01"'; Commands = @(); Version = "7.0"; OS = "Windows"; ProblemCount = 0 }
         @{ Target = $Srv2019_7_profile; Script = '$zip = New-WebServiceProxy -Uri "http://www.webservicex.net/uszip.asmx?WSDL"'; Commands = @("New-WebServiceProxy"); Version = "7.0"; OS = "Windows"; ProblemCount = 1 }
+
+        @{ Target = $Win11_5_profile; Script = "Get-Uptime"; Commands = @("Get-Uptime"); Version = "5.1"; OS = "Windows"; ProblemCount = 1 }
+        @{ Target = $Win11_5_profile; Script = 'gci .'; Commands = @(); Version = "5.1"; OS = "Windows"; ProblemCount = 0 }
+
+        @{ Target = $Win11_7_4_profile; Script = "Add-PSSnapIn MySnapIn"; Commands = @("Add-PSSnapIn"); Version = "7.4"; OS = "Windows"; ProblemCount = 1 }
+        @{ Target = $Win11_7_4_profile; Script = "Get-Uptime"; Commands = @(); Version = "7.4"; OS = "Windows"; ProblemCount = 0 }
+        @{ Target = $Win11_7_5_profile; Script = "Add-PSSnapIn MySnapIn"; Commands = @("Add-PSSnapIn"); Version = "7.5"; OS = "Windows"; ProblemCount = 1 }
+        @{ Target = $Win11_7_5_profile; Script = "Get-Uptime"; Commands = @(); Version = "7.5"; OS = "Windows"; ProblemCount = 0 }
+        @{ Target = $Win11_7_6_profile; Script = "Add-PSSnapIn MySnapIn"; Commands = @("Add-PSSnapIn"); Version = "7.6"; OS = "Windows"; ProblemCount = 1 }
+        @{ Target = $Win11_7_6_profile; Script = "Get-Uptime"; Commands = @(); Version = "7.6"; OS = "Windows"; ProblemCount = 0 }
     )
 
     $ParameterCompatibilityTestCases = @(
@@ -231,6 +245,9 @@ BeforeDiscovery {
 
         @{ Target = $Srv2019_7_profile; Script = 'Get-Help "Invoke-WebRequest" -ShowWindow'; Commands = @(); Parameters = @(); Version = "7.0"; OS = 'Windows'; ProblemCount = 0 }
         @{ Target = $Srv2019_7_profile; Script = 'Start-Service "eventlog" -ComputerName "MyComputer"'; Commands = @('Start-Service'); Parameters = @('ComputerName'); Version = "7.0"; OS = 'Windows'; ProblemCount = 1 }
+
+        @{ Target = $Win11_5_profile; Script = '$obj = ConvertFrom-Json $json -AsHashtable'; Commands = @('ConvertFrom-Json'); Parameters = @('AsHashtable'); Version = '5.1'; OS = 'Windows'; ProblemCount = 1 }
+        @{ Target = $Win11_7_6_profile; Script = '$obj = ConvertFrom-Json $json -AsHashtable'; Commands = @(); Parameters = @(); Version = '7.6'; OS = 'Windows'; ProblemCount = 0 }
     )
 }
 

docs/Rules/UseCompatibleCommands.md

@@ -1,6 +1,6 @@
 ---
 description: Use compatible commands
-ms.date: 07/21/2026
+ms.date: 10/18/2026
 ms.topic: reference
 title: UseCompatibleCommands
 ---
@@ -54,6 +54,7 @@ Platforms bundled by default are:
 |        5.1         | Windows Server 2016    | `win-8_x64_10.0.14393.0_5.1.14393.2791_x64_4.0.30319.42000_framework` |
 |        5.1         | Windows Server 2019    | `win-8_x64_10.0.17763.0_5.1.17763.316_x64_4.0.30319.42000_framework`  |
 |        5.1         | Windows 10 Pro         | `win-48_x64_10.0.17763.0_5.1.17763.316_x64_4.0.30319.42000_framework` |
+|        5.1         | Windows 11 Enterprise  | `win-4_x64_10.0.26200.0_5.1.26100.9711_x64_4.0.30319.42000_framework` |
 |        6.2         | Ubuntu 18.04 LTS       | `ubuntu_x64_18.04_6.2.4_x64_4.0.30319.42000_core`                     |
 |        6.2         | Windows 10.0.14393     | `win-8_x64_10.0.14393.0_6.2.4_x64_4.0.30319.42000_core`               |
 |        6.2         | Windows 10.0.17763     | `win-8_x64_10.0.17763.0_6.2.4_x64_4.0.30319.42000_core`               |
@@ -62,6 +63,9 @@ Platforms bundled by default are:
 |        7.0         | Windows 10.0.14393     | `win-8_x64_10.0.14393.0_7.0.0_x64_3.1.2_core`                         |
 |        7.0         | Windows 10.0.17763     | `win-8_x64_10.0.17763.0_7.0.0_x64_3.1.2_core`                         |
 |        7.0         | Windows 10.0.18362     | `win-4_x64_10.0.18362.0_7.0.0_x64_3.1.2_core`                         |
+|        7.4         | Windows 11 Enterprise  | `win-4_x64_10.0.26200.0_7.4.21_x64_8.0.32_core`                       |
+|        7.5         | Windows 11 Enterprise  | `win-4_x64_10.0.26200.0_7.5.12_x64_9.0.21_core`                       |
+|        7.6         | Windows 11 Enterprise  | `win-4_x64_10.0.26200.0_7.6.7_x64_10.0.13_core`                       |
 
 Other profiles can be found in the [GitHub repo][02].
 

docs/Rules/UseCompatibleTypes.md

@@ -1,6 +1,6 @@
 ---
 description: Use compatible types
-ms.date: 07/21/2026
+ms.date: 10/18/2026
 ms.topic: reference
 title: UseCompatibleTypes
 ---
@@ -54,6 +54,7 @@ Platforms bundled by default are:
 |        5.1         | Windows Server 2016    | `win-8_x64_10.0.14393.0_5.1.14393.2791_x64_4.0.30319.42000_framework` |
 |        5.1         | Windows Server 2019    | `win-8_x64_10.0.17763.0_5.1.17763.316_x64_4.0.30319.42000_framework`  |
 |        5.1         | Windows 10 Pro         | `win-48_x64_10.0.17763.0_5.1.17763.316_x64_4.0.30319.42000_framework` |
+|        5.1         | Windows 11 Enterprise  | `win-4_x64_10.0.26200.0_5.1.26100.9711_x64_4.0.30319.42000_framework` |
 |        6.2         | Ubuntu 18.04 LTS       | `ubuntu_x64_18.04_6.2.4_x64_4.0.30319.42000_core`                     |
 |        6.2         | Windows 10.0.14393     | `win-8_x64_10.0.14393.0_6.2.4_x64_4.0.30319.42000_core`               |
 |        6.2         | Windows 10.0.17763     | `win-8_x64_10.0.17763.0_6.2.4_x64_4.0.30319.42000_core`               |
@@ -62,6 +63,9 @@ Platforms bundled by default are:
 |        7.0         | Windows 10.0.14393     | `win-8_x64_10.0.14393.0_7.0.0_x64_3.1.2_core`                         |
 |        7.0         | Windows 10.0.17763     | `win-8_x64_10.0.17763.0_7.0.0_x64_3.1.2_core`                         |
 |        7.0         | Windows 10.0.18362     | `win-4_x64_10.0.18362.0_7.0.0_x64_3.1.2_core`                         |
+|        7.4         | Windows 11 Enterprise  | `win-4_x64_10.0.26200.0_7.4.21_x64_8.0.32_core`                       |
+|        7.5         | Windows 11 Enterprise  | `win-4_x64_10.0.26200.0_7.5.12_x64_9.0.21_core`                       |
+|        7.6         | Windows 11 Enterprise  | `win-4_x64_10.0.26200.0_7.6.7_x64_10.0.13_core`                       |
 
 Other profiles can be found in the [GitHub repo][02].