From 54738a8c58823999873f430a921bc620f597f77c Mon Sep 17 00:00:00 2001
From: Marek Safar <marek.safar@gmail.com>
Date: Tue, 27 Apr 2021 08:45:20 +0200
Subject: [PATCH] Make EventSourceAutoGenerateAttribute conditional to not be
 emitted into output assembly

---
 .../src/System/Diagnostics/Tracing/EventSource.cs                | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/libraries/System.Private.CoreLib/src/System/Diagnostics/Tracing/EventSource.cs b/src/libraries/System.Private.CoreLib/src/System/Diagnostics/Tracing/EventSource.cs
index 398b1f9a128b27..552878213779c2 100644
--- a/src/libraries/System.Private.CoreLib/src/System/Diagnostics/Tracing/EventSource.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Diagnostics/Tracing/EventSource.cs
@@ -186,6 +186,7 @@ namespace Microsoft.Diagnostics.Tracing
 #else
 namespace System.Diagnostics.Tracing
 {
+    [Conditional("NEEDED_FOR_SOURCE_GENERATOR_ONLY")]
     [AttributeUsage(AttributeTargets.Class)]
     internal sealed class EventSourceAutoGenerateAttribute : Attribute
     {