Change MatchType for EnumerationOptions to be Win32 (#9529)

src/System.Management.Automation/namespaces/FileSystemProvider.cs

@@ -85,6 +85,7 @@ namespace Microsoft.PowerShell.Commands
         private Collection<WildcardPattern> _excludeMatcher = null;
         private static System.IO.EnumerationOptions _enumerationOptions = new System.IO.EnumerationOptions
         {
+            MatchType = MatchType.Win32,
             MatchCasing = MatchCasing.CaseInsensitive,
             AttributesToSkip = 0 // Default is to skip Hidden and System files, so we clear this to retain existing behavior
         };

test/powershell/Modules/Microsoft.PowerShell.Management/Get-ChildItem.Tests.ps1

@@ -169,6 +169,11 @@ Describe "Get-ChildItem" -Tags "CI" {
             $file.Count | Should be 1
             $file.Name | Should be "pagefile.sys"
         }
+
+        It "-Filter *. finds extension-less files" {
+            $null = New-Item -Path TestDrive:/noextension -ItemType File
+            (Get-ChildItem -File -LiteralPath TestDrive:/ -Filter noext*.*).Name | Should -BeExactly 'noextension'
+        }
     }
 
     Context 'Env: Provider' {