diff --git a/01_introduction_to_algorithms/csharp/01_binary_search/Program.cs b/01_introduction_to_algorithms/csharp/01_binary_search/Program.cs
index 97107a44..65bf0132 100644
--- a/01_introduction_to_algorithms/csharp/01_binary_search/Program.cs
+++ b/01_introduction_to_algorithms/csharp/01_binary_search/Program.cs
@@ -16,7 +16,7 @@ public static void Main(string[] args)
         private static int? BinarySearch(IList<int> list, int item)
         {
             var low = 0;
-            var high = list.Count() - 1;
+            var high = list.Count - 1;
 
             while (low <= high)
             {