diff --git a/src/algorithm_exercises_csharp/hackerrank/interview_preparation_kit/dictionaries_and_hashmaps/CountTriplets.cs b/src/algorithm_exercises_csharp/hackerrank/interview_preparation_kit/dictionaries_and_hashmaps/CountTriplets.cs
index 0dc12fb..2f782cc 100644
--- a/src/algorithm_exercises_csharp/hackerrank/interview_preparation_kit/dictionaries_and_hashmaps/CountTriplets.cs
+++ b/src/algorithm_exercises_csharp/hackerrank/interview_preparation_kit/dictionaries_and_hashmaps/CountTriplets.cs
@@ -4,10 +4,14 @@
 
 namespace algorithm_exercises_csharp.hackerrank.interview_preparation_kit.dictionaries_and_hashmaps;
 
+using System.Diagnostics.CodeAnalysis;
 using System.Collections.Generic;
 
 public class CountTriplets
 {
+  [ExcludeFromCodeCoverage]
+  protected CountTriplets() { }
+
   public static long countTriplets(List<long> arr, long r)
   {
     Dictionary<long, long> aCounter = [];
diff --git a/src/algorithm_exercises_csharp/hackerrank/interview_preparation_kit/dictionaries_and_hashmaps/CountTripletsBruteForce.cs b/src/algorithm_exercises_csharp/hackerrank/interview_preparation_kit/dictionaries_and_hashmaps/CountTripletsBruteForce.cs
index fd12046..29c6f04 100644
--- a/src/algorithm_exercises_csharp/hackerrank/interview_preparation_kit/dictionaries_and_hashmaps/CountTripletsBruteForce.cs
+++ b/src/algorithm_exercises_csharp/hackerrank/interview_preparation_kit/dictionaries_and_hashmaps/CountTripletsBruteForce.cs
@@ -7,6 +7,9 @@ namespace algorithm_exercises_csharp.hackerrank.interview_preparation_kit.dictio
 
 public class CountTripletsBruteForce
 {
+  [ExcludeFromCodeCoverage]
+  protected CountTripletsBruteForce() { }
+
   public static long countTriplets(List<long> arr, long r)
   {
     long size = arr.Count;
diff --git a/src/algorithm_exercises_csharp/hackerrank/interview_preparation_kit/dictionaries_and_hashmaps/RansomNote.cs b/src/algorithm_exercises_csharp/hackerrank/interview_preparation_kit/dictionaries_and_hashmaps/RansomNote.cs
index d2055be..7a72a0d 100644
--- a/src/algorithm_exercises_csharp/hackerrank/interview_preparation_kit/dictionaries_and_hashmaps/RansomNote.cs
+++ b/src/algorithm_exercises_csharp/hackerrank/interview_preparation_kit/dictionaries_and_hashmaps/RansomNote.cs
@@ -7,6 +7,9 @@ namespace algorithm_exercises_csharp.hackerrank.interview_preparation_kit.dictio
 
 public class RansomNote
 {
+  [ExcludeFromCodeCoverage]
+  protected RansomNote() { }
+
   public class InvalidValueException : Exception
   {
     // constructor for the InvalidAgeException class
@@ -16,9 +19,6 @@ public InvalidValueException(string msg)
     }
   }
 
-  [ExcludeFromCodeCoverage]
-  protected RansomNote() { }
-
   private static readonly string __YES__ = "Yes";
   private static readonly string __NO__ = "No";