@@ -0,0 +1,29 @@
+function Get-RulesFromCSV {
+    param(
+        [ValidateSet('c', 'cpp', 'all')]
+        [string]
+        $Language = 'all')
+
+
+        $csvFile = (Join-Path (Get-RepositoryRoot) "rules.csv")
+    
+        Write-Host "Loading rules for language=$Language from file $csvFile..."
+
+        $csv = Import-Csv $csvFile
+        $filteredCSV = @()
+        # don't filter if not neeeded 
+        if ($Language -eq 'all'){
+            $filteredCSV = $csv
+        }else{
+            foreach($rule in $csv){
+                if($rule.Language -eq $Language){
+                    $filteredCSV += $rule 
+                }
+            }
+        }
+ 
+        Write-Host "Loaded $($filteredCSV.Length) rules."
+
+        return $csv 
+
+}
@@ -0,0 +1,46 @@
+#!/usr/bin/env pwsh
+param(    
+    [ValidateSet('c', 'cpp', 'all')]
+    [string]
+    $Language = 'all',
+    [switch]
+    $CIMode
+
+)
+
+Import-Module -Name "$PSScriptRoot\..\PSCodingStandards\CodingStandards"
+
+# load the rules.
+$rules = Get-RulesFromCSV -Language $Language
+
+# find out duplicates
+$counter = @{} 
+
+foreach($rule in $rules){
+    if($counter.Contains($rule.ID)){
+        $counter[$rule.ID] += $rule
+    }else{
+        $counter[$rule.ID] = @()
+        $counter[$rule.ID] += $rule
+    }
+}
+
+$duplicates = @()
+$numDuplicates = 0
+
+foreach($k in $counter.Keys){
+    if($counter[$k].Count -gt 1){
+        $numDuplicates = $numDuplicates + 1 
+        foreach($v in $counter[$k]){
+            $duplicates += $v           
+        }    
+    }
+}
+
+$duplicates | Format-Table 
+
+if(($CIMode) -and ($numDuplicates -gt 0)){
+    throw "Found $numDuplicates duplicate Rule IDs"
+}else{
+    Write-Host "Found $numDuplicates duplicate Rule IDs"
+}