FileNotFoundException with FileInfo.Length on Linux if binary filename contains a 0xDF-Byte

Special characters in Linux filenames can confuse the FileInfo.Length property, resulting in FileNotFoundException as shown in the attached test case , see also readme.txt inside the attached zip. SSharpException.zip

Edit: Another manifestation of this was reported in #76877. Those details are included below.

Description

If the path contains what I think is a blank character of some sort from classic Mac (I found it in an Apple archive), Directory.GetFiles will throw a DirectoryNotFoundException (I was also getting access denied on another machine but I can't reproduce that)

Reproduction Steps

It's difficult to put this into a Dockerfile or Bash script due to character escaping but the following should illustrate the issue

mkdir -p /tmp/test/''$'\240'hiddencharacter
dotnet new console
echo 'foreach (var dir in Directory.GetDirectories("/tmp/test")) Directory.GetFiles(dir);' > Program.cs
dotnet run

Unhandled exception. System.IO.DirectoryNotFoundException: Could not find a part of the path '/tmp/test/�hiddencharacter'.
   at System.IO.Enumeration.FileSystemEnumerator`1.CreateDirectoryHandle(String path, Boolean ignoreNotFound)
   at System.IO.Enumeration.FileSystemEnumerator`1.Init()
   at System.IO.Enumeration.FileSystemEnumerator`1..ctor(String directory, Boolean isNormalized, EnumerationOptions options)
   at System.IO.Enumeration.FileSystemEnumerable`1..ctor(String directory, FindTransform transform, EnumerationOptions options, Boolean isNormalized)
   at System.IO.Enumeration.FileSystemEnumerableFactory.UserFiles(String directory, String expression, EnumerationOptions options)
   at System.IO.Directory.InternalEnumeratePaths(String path, String searchPattern, SearchTarget searchTarget, EnumerationOptions options)
   at System.IO.Directory.GetFiles(String path, String searchPattern, EnumerationOptions enumerationOptions)
   at System.IO.Directory.GetFiles(String path)
   at Program.<Main>$(String[] args) in /src/Program.cs:line 1

Expected behavior

Files in directory are enumerated

Actual behavior

Exception

Regression?

Unknown, it fails with mono, too.

Known Workarounds

Unknown, I found this when using FileSystemEnumerable, my workaround is to test with Directory.GetFiles and then proceed with FileSystemEnumerable if there's no exception.

Configuration

Tested with: NET 6.0 docker image NET 7.0.100-rc.1.22431.12 on Debian bookworm

Other information

Setting LANG did not help