Protect against index out of range exceptions

73_Reverse/csharp/Reverse/Reverse.Tests/ReverserTests.cs

@@ -37,5 +37,16 @@ namespace Reverse.Tests
 
             Assert.True(input.SequenceEqual(output));
         }
+
+        [Fact]
+        public void Reverse_WithIndexGreaterThanArrayLength_DoesNothing()
+        {
+            var input = new int[] { 1, 2 };
+            var output = new int[] { 1, 2 };
+
+            Reverser.Reverse(input, input.Length + 1);
+
+            Assert.True(input.SequenceEqual(output));
+        }
     }
 }

73_Reverse/csharp/Reverse/Reverse/Reverser.cs

@@ -4,6 +4,11 @@
     {
         public static void Reverse(int[] arrayToReverse, int indexToReverseTo)
         {
+            if (indexToReverseTo > arrayToReverse.Length)
+            {
+                return;
+            }
+
             for (int i = 0; i < indexToReverseTo / 2; i++)
             {
                 int temp = arrayToReverse[i];