diff --git a/docs/src/api/class-browsercontext.md b/docs/src/api/class-browsercontext.md
index 83e2a44912..7cfc18b7a0 100644
--- a/docs/src/api/class-browsercontext.md
+++ b/docs/src/api/class-browsercontext.md
@@ -91,7 +91,7 @@ background_page = context.wait_for_event("backgroundpage")
 ```
 
 ```csharp
-context.BackgroundPage += (backgroundPage) =>
+context.BackgroundPage += (_, backgroundPage) =>
 {
     Console.WriteLine(backgroundPage.Url);
 };