Revert incorrect doc version change

.openpublishing.redirection.core.json

@@ -494,6 +494,10 @@
       "source_path_from_root": "/docs/core/compatibility/core-libraries/8.0/indexofanyvalues-renamed.md",
       "redirect_url": "/dotnet/core/compatibility/8.0"
     },
+    {
+      "source_path_from_root": "/docs/core/compatibility/core-libraries/8.0/drive-current-dir-paths.md",
+      "redirect_url": "/dotnet/core/compatibility/core-libraries/9.0/drive-current-dir-paths"
+    },
     {
       "source_path_from_root": "/docs/core/compatibility/core-libraries/8.0/optimizeforreading-arg.md",
       "redirect_url": "/dotnet/core/compatibility/8.0"

docs/core/compatibility/8.0.md

@@ -38,7 +38,6 @@ See [Breaking changes in ASP.NET Core 8](/aspnet/core/breaking-changes/8/overvie
 | [Base64.DecodeFromUtf8 methods ignore whitespace](core-libraries/8.0/decodefromutf8-whitespace.md)        | Behavioral change   |
 | [Boolean-backed enum type support removed](core-libraries/8.0/bool-backed-enum.md)                        | Behavioral change   |
 | [Complex.ToString format changed to `<a; b>`](core-libraries/8.0/complex-format.md)              | Behavioral change   |
-| [Drive's current directory path enumeration](core-libraries/8.0/drive-current-dir-paths.md)              | Behavioral change   |
 | [Enumerable.Sum throws new OverflowException for some inputs](core-libraries/8.0/enumerable-sum.md)       | Behavioral change   |
 | [FileStream writes when pipe is closed](core-libraries/8.0/filestream-disposed-pipe.md)                   | Behavioral change   |
 | [FindSystemTimeZoneById doesn't return new object](core-libraries/8.0/timezoneinfo-object.md)             | Behavioral change   |

docs/core/compatibility/9.0.md

@@ -35,6 +35,7 @@ See [Breaking changes in ASP.NET Core 9](/aspnet/core/breaking-changes/9/overvie
 | [C# overload resolution prefers `params` span-type overloads](core-libraries/9.0/params-overloads.md)                                                     | Source incompatible        |                    |
 | [Creating type of array of System.Void not allowed](core-libraries/9.0/type-instance.md)                                                                  | Behavioral change          | Preview 1          |
 | [Default `Equals()` and `GetHashCode()` throw for types marked with `InlineArrayAttribute`](core-libraries/9.0/inlinearrayattribute.md)                   | Behavioral change          | Preview 6          |
+| [Drive's current directory path enumeration](core-libraries/9.0/drive-current-dir-paths.md)                                                               | Behavioral change          | Preview 1          |
 | [EnumConverter validates registered types to be enum](core-libraries/9.0/enumconverter.md)                                                                | Behavioral change          | Preview 7          |
 | [FromKeyedServicesAttribute no longer injects non-keyed parameter](core-libraries/9.0/non-keyed-params.md)                                                | Behavioral change          | RC 1               |
 | [IncrementingPollingCounter initial callback is asynchronous](core-libraries/9.0/async-callback.md)                                                       | Behavioral change          | RC 1               |

docs/core/compatibility/core-libraries/8.0/drive-current-dir-paths.md → docs/core/compatibility/core-libraries/9.0/drive-current-dir-paths.md

@@ -1,6 +1,6 @@
 ---
 title: "Breaking change: Drive's current directory path enumeration"
-description: Learn about the .NET 8 breaking change in core .NET libraries where files are enumerated without a separator after the path when the path is the drive's current directory.
+description: Learn about the .NET 9 breaking change in core .NET libraries where files are enumerated without a separator after the path when the path is the drive's current directory.
 ms.date: 02/09/2024
 ---
 # Drive's current directory path enumeration
@@ -39,7 +39,7 @@ C:\Program.cs
 
 ## New behavior
 
-Running the same code snippet in .NET 8 and later versions produces output without a separator character in each path.
+Running the same code snippet in .NET 9 and later versions produces output without a separator character in each path.
 
 ```output
 Full path of "C:" is C:\Users\myalias\consoleapps\Program.
@@ -54,7 +54,7 @@ C:Program.cs
 
 ## Version introduced
 
-.NET 8
+.NET 9
 
 ## Type of breaking change
 

docs/core/compatibility/toc.yml

@@ -336,6 +336,8 @@ items:
                 href: core-libraries/9.0/params-overloads.md
               - name: Creating type of array of System.Void not allowed
                 href: core-libraries/9.0/type-instance.md
+              - name: Drive's current directory path enumeration
+                href: core-libraries/9.0/drive-current-dir-paths.md
               - name: EnumConverter validates registered types to be enum
                 href: core-libraries/9.0/enumconverter.md
               - name: "`Equals`/`GetHashCode` throw for `InlineArrayAttribute` types"
@@ -492,8 +494,6 @@ items:
                 href: core-libraries/8.0/bool-backed-enum.md
               - name: Complex.ToString format changed to `<a; b>`
                 href: core-libraries/8.0/complex-format.md
-              - name: Drive's current directory path enumeration
-                href: core-libraries/8.0/drive-current-dir-paths.md
               - name: Enumerable.Sum throws new OverflowException for some inputs
                 href: core-libraries/8.0/enumerable-sum.md
               - name: FileStream writes when pipe is closed