Merge pull request #1174 from fsprojects/repo-assist/improve-fcs-pin-seq-cast-2026-04-18-7bf530223a32aad3

[Repo Assist] eng: fix stale FCS VersionOverride; replace Enumerable.Cast with Seq.cast

Author: dsyme

RELEASE_NOTES.md

@@ -7,6 +7,8 @@
 * Replace deprecated `System.Net.WebClient` with `System.Net.Http.HttpClient` in the image downloader used by `--saveimages`. Removes the `#nowarn "44"` suppression.
 * Bump `Newtonsoft.Json` transitive-dependency pin from 13.0.3 to 13.0.4.
 * Bump `System.Memory` transitive-dependency pin from 4.5.5 to 4.6.3.0
+* Remove stale `VersionOverride="43.12.201"` on the `FSharp.Compiler.Service` reference in `FSharp.Formatting.Markdown.fsproj`; the package now uses the central pin (`43.12.202`) from `Directory.Packages.props`, eliminating the NU1605 build warning.
+* Replace `Enumerable.Cast<XAttribute>` (LINQ) with `Seq.cast<XAttribute>` (idiomatic F#) in `MarkdownUtils.fs`, removing the `open System.Linq` import.
 
 ### Fixed
 * Fix `Markdown.ToMd` silently dropping YAML frontmatter when serialising a parsed `MarkdownDocument` back to Markdown text. Frontmatter is now preserved with its `---` delimiters.

src/FSharp.Formatting.Markdown/FSharp.Formatting.Markdown.fsproj

@@ -26,7 +26,7 @@
     <ProjectReference Include="..\FSharp.Formatting.Common\FSharp.Formatting.Common.fsproj" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="FSharp.Compiler.Service" VersionOverride="43.12.201" />
+    <PackageReference Include="FSharp.Compiler.Service" />
     <PackageReference Include="FSharp.Core" />
   </ItemGroup>
 </Project>

src/FSharp.Formatting.Markdown/MarkdownUtils.fs

@@ -6,7 +6,6 @@ namespace rec FSharp.Formatting.Markdown
 
 open System
 open System.Collections.Generic
-open System.Linq
 open System.Xml.Linq
 open FSharp.Formatting.Templating
 
@@ -423,7 +422,7 @@ module internal MarkdownUtils =
                         let attributes =
                             match System.Xml.XPath.Extensions.XPathEvaluate(element, "//*/@*[contains(., '.md')]") with
                             | :? System.Collections.IEnumerable as enumerable ->
-                                enumerable |> Enumerable.Cast<XAttribute> |> Seq.toArray
+                                enumerable |> Seq.cast<XAttribute> |> Seq.toArray
                             | _ -> Array.empty
 
                         if Array.isEmpty attributes then