diff --git a/docs/AN0007.md b/docs/AN0007.md
index 41c1c84..439493b 100644
--- a/docs/AN0007.md
+++ b/docs/AN0007.md
@@ -11,11 +11,11 @@
 ### Code with Diagnostic
 
 ```csharp
-string date = DateTime.UtcNow.ToString(""yyyy/MM/dd"");
+string date = DateTime.UtcNow.ToString("yyyy/MM/dd");
 ```
 
 ### Code with Fix
 
 ```csharp
-string date = DateTime.UtcNow.ToString(""yyyy/MM/dd"", CultureInfo.InvariantCulture);
+string date = DateTime.UtcNow.ToString("yyyy/MM/dd", CultureInfo.InvariantCulture);
 ```