diff --git a/DotNet/C#/C#.md b/DotNet/C#/C#.md
index fe734ae..08d7945 100644
--- a/DotNet/C#/C#.md
+++ b/DotNet/C#/C#.md
@@ -564,7 +564,6 @@ variable is null
 variable is not null
 
 // null parameter checking [C# 10]
-Method(Type arg!!) {}  // will throwArgumentNullException if arg is null
 ArgumentNullException.ThrowIfNull(obj);
 ```