diff --git a/instructions/csharp.instructions.md b/instructions/csharp.instructions.md
index 8d6f4c20c..c44afae73 100644
--- a/instructions/csharp.instructions.md
+++ b/instructions/csharp.instructions.md
@@ -30,6 +30,7 @@ applyTo: '**/*.cs'
 - Use pattern matching and switch expressions wherever possible.
 - Use `nameof` instead of string literals when referring to member names.
 - Ensure that XML doc comments are created for any public APIs. When applicable, include `<example>` and `<code>` documentation in the comments.
+- Add a trailing comma after the last value in multi-line arrays, collection initializers, object initializers, and enum declarations to prevent MA0007 warnings.
 
 ## Project Setup and Structure