diff --git a/exercises/bowling/BowlingTest.cs b/exercises/bowling/BowlingTest.cs
index 1d251b714a..229b258aa4 100644
--- a/exercises/bowling/BowlingTest.cs
+++ b/exercises/bowling/BowlingTest.cs
@@ -291,7 +291,7 @@ public void Cannot_roll_after_bonus_rolls_for_strike()
         Assert.Throws<ArgumentException>(() => sut.Roll(2));
     }
 
-    public void DoRoll(IEnumerable<int> rolls, BowlingGame sut)
+    private void DoRoll(IEnumerable<int> rolls, BowlingGame sut)
     {
         foreach (var roll in rolls)
         {
diff --git a/exercises/triangle/Example.cs b/exercises/triangle/Example.cs
index d9f64646cd..65e13ebba7 100644
--- a/exercises/triangle/Example.cs
+++ b/exercises/triangle/Example.cs
@@ -11,7 +11,6 @@ public enum TriangleKind
 
 public static class Triangle
 {
-    
     public static bool IsScalene(double side1, double side2, double side3)
     {
         return Kind(side1, side2, side3) == TriangleKind.Scalene;
@@ -65,6 +64,4 @@ private static int UniqueSides(double side1, double side2, double side3)
         double[] sides = { side1, side2, side3 };
         return sides.Distinct().Count();
     }
-}
-
-public class TriangleException : Exception { }
\ No newline at end of file
+}
\ No newline at end of file
diff --git a/exercises/triangle/Triangle.cs b/exercises/triangle/Triangle.cs
index c50a436b93..f40ca9bed9 100644
--- a/exercises/triangle/Triangle.cs
+++ b/exercises/triangle/Triangle.cs
@@ -16,7 +16,4 @@ public static bool IsEquilateral(double side1, double side2, double side3)
     {
         throw new NotImplementedException("You need to implement this function.");
     }
-    
-}
-
-public class TriangleException : Exception { }
\ No newline at end of file
+}
\ No newline at end of file
diff --git a/generators/Exercises/Generators/Bowling.cs b/generators/Exercises/Generators/Bowling.cs
index 0df2cdc931..3fd7a9559c 100644
--- a/generators/Exercises/Generators/Bowling.cs
+++ b/generators/Exercises/Generators/Bowling.cs
@@ -78,7 +78,7 @@ protected override void UpdateTestClass(TestClass testClass)
         private static void AddDoRollMethod(TestClass testClass)
         {
             testClass.AdditionalMethods.Add(@"
-public void DoRoll(IEnumerable<int> rolls, BowlingGame sut)
+private void DoRoll(IEnumerable<int> rolls, BowlingGame sut)
 {
     foreach (var roll in rolls)
     {