diff --git a/samples/CS9/Program.cs b/samples/CS9/Program.cs
index 3968700..3eb02e1 100644
--- a/samples/CS9/Program.cs
+++ b/samples/CS9/Program.cs
@@ -31,7 +31,7 @@ namespace CS9 {
       NotValuable
     }
 
-    // Positional patterns with placeholders - note that
+    // Positional patterns with "discard" placeholders - note that
     //   the element lists must be "complete"!
     static OrderValue OrderValueCategory(Order o) =>
       o switch {