PowerShell - Unable to Search for [LIKE] File Names recursively through sub-directories

I have a list of a few hundred files that I need to search for. Most do NOT have file extensions, some do. I can separate those and run the job multiple times if I have to.

I have a script that I have been trying to get right and it Does not seem to work. I need to match on just the file names and NOT the extensions.
I'm using the "-Like" option but that is not getting me the results I need. If I include a file extension then it works. Unfortunately I have many file names with unknown extensions and I need to match on just the name.

Also, the script does not seem to be scanning the sub-directories for matches. Does -Recurse not work in my example?

And Finally, when testing and I FORCE a match, it does not display the subdirectory the match was found in.

Any assistance would be most welcome. Regards, -Ron

#Start in this DIR
 $folder = 'C:\Workspace\' 
#Get the file list here
 $Dir2 = 'C:\Workspace\'
 $files=Get-Content $Dir2\MISSING_BMS.txt

    Write-Host "Starting Folder: $folder"
    # Get only files and only their names
    $folderFiles = Get-ChildItem -Recurse $folder -File -Name
    #Read through Directory and sub-directories
       foreach ($f in $files) {
          if ($folderFiles -contains $f) { 
            Write-Host "File $f was found." -foregroundcolor green
        } else { 
            Write-Host "File $f was not found!" -foregroundcolor red 
        }
    }

Solution

Get-ChildItem's -Name switch doesn't just output names when combined with -Recurse, it outputs relative paths for items located inside subdirectories.

Therefore, it is better not to use this switch and compare against the .Name property of the [System.IO.FileInfo] instances that Get-ChildItem emits by default.

# Get only files and only their names - note the use of (...).Name
$folderFiles = (Get-ChildItem -Recurse $folder -File).Name

Note that if your $Dir2\MISSING_BMS.txt file contains verbatim file names rather than wildcard patterns, you should use the -contains operator rather than -like, the wildcard matching operator.

Also, if you need to access the full paths later:

# Get the files as [System.IO.FileInfo] instances
$folderFileInfos = Get-ChildItem -Recurse $folder -File

# ...

# Access the .Name property now, using member enumeration, and see 
# if the array of names contains $f
if ($folderFileInfos.Name -contains $f) { ...