diff --git a/guide/english/csharp/for-loop/index.md b/guide/english/csharp/for-loop/index.md
index 2399c5abff..9c50c93661 100644
--- a/guide/english/csharp/for-loop/index.md
+++ b/guide/english/csharp/for-loop/index.md
@@ -34,6 +34,7 @@ for (int i = 0; i < 5; i++)
 > Number 3
 > Number 4
 ```
+- Only counts to 4 due to the fact that the initial number is 0 meaning that 5 numbers including 0 would reach 4.
 
 ### Example 2
 ```