WindowsPathChecker - A simple console application to check the validity of paths

WindowsPathChecker.ps1

# ***********************************************************************
#  WindowsPathChecker
#    A simple console application to check
#    the validity of paths in the Windows PATH environment variable.
# ***********************************************************************

using namespace System
using namespace System.IO
using namespace System.Collections.Generic

Set-StrictMode -Verbose -Version Latest

$paths = $env:Path.Split(';', [StringSplitOptions]::RemoveEmptyEntries)
$uniquePaths = [HashSet[string]]::new([StringComparer]::OrdinalIgnoreCase)

foreach($p in $paths) {
	$exists = [Directory]::Exists($p)
	$isDuplicate = (-not ($uniquePaths.Add($p)))
	$result = ""
	if (-not $exists) {
		$result += "X"
	}
	if ($isDuplicate) {
		$result += "D"
	}
	[Console]::WriteLine("${result}    ${p}")
}