From ef4b80bd00729dde2bc8c9e4b6cebdcc9406af1d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Borja=20Dom=C3=ADnguez?= <iam.n3uro@gmail.com>
Date: Mon, 7 Jul 2025 14:26:16 +0200
Subject: [PATCH 1/3] Add netstandard2.0 compatibility to
 Microsoft.Extensions.Http.Resilience and dependencies

---
 .../Microsoft.Extensions.Http.Resilience.csproj                  | 1 +
 .../Microsoft.Extensions.Resilience.csproj                       | 1 +
 2 files changed, 2 insertions(+)

diff --git a/src/Libraries/Microsoft.Extensions.Http.Resilience/Microsoft.Extensions.Http.Resilience.csproj b/src/Libraries/Microsoft.Extensions.Http.Resilience/Microsoft.Extensions.Http.Resilience.csproj
index 8d280d747cb..b0b16eb4020 100644
--- a/src/Libraries/Microsoft.Extensions.Http.Resilience/Microsoft.Extensions.Http.Resilience.csproj
+++ b/src/Libraries/Microsoft.Extensions.Http.Resilience/Microsoft.Extensions.Http.Resilience.csproj
@@ -1,6 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <RootNamespace>Microsoft.Extensions.Http.Resilience</RootNamespace>
+    <TargetFrameworks>$(NetCoreTargetFrameworks);netstandard2.0;net462</TargetFrameworks>
     <Description>Resilience mechanisms for HttpClient.</Description>
     <Workstream>Resilience</Workstream>
   </PropertyGroup>
diff --git a/src/Libraries/Microsoft.Extensions.Resilience/Microsoft.Extensions.Resilience.csproj b/src/Libraries/Microsoft.Extensions.Resilience/Microsoft.Extensions.Resilience.csproj
index ebd63256933..519b6632d07 100644
--- a/src/Libraries/Microsoft.Extensions.Resilience/Microsoft.Extensions.Resilience.csproj
+++ b/src/Libraries/Microsoft.Extensions.Resilience/Microsoft.Extensions.Resilience.csproj
@@ -1,6 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <RootNamespace>Microsoft.Extensions.Resilience</RootNamespace>
+    <TargetFrameworks>$(NetCoreTargetFrameworks);netstandard2.0;net462</TargetFrameworks>
     <Description>Extensions to the Polly libraries to enrich telemetry with metadata and exception summaries.</Description>
     <Workstream>Resilience</Workstream>
   </PropertyGroup>

From d6367ea2b9939c4e3bdebd73c7f52f451d4d13b5 Mon Sep 17 00:00:00 2001
From: evgenyfedorov2 <25526458+evgenyfedorov2@users.noreply.github.com>
Date: Tue, 8 Jul 2025 09:09:53 +0200
Subject: [PATCH 2/3] Fix csproj files

---
 ...crosoft.Extensions.Diagnostics.ExceptionSummarization.csproj | 1 +
 .../Microsoft.Extensions.Http.Diagnostics.csproj                | 1 +
 .../Microsoft.Extensions.Http.Resilience.csproj                 | 2 +-
 3 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Libraries/Microsoft.Extensions.Diagnostics.ExceptionSummarization/Microsoft.Extensions.Diagnostics.ExceptionSummarization.csproj b/src/Libraries/Microsoft.Extensions.Diagnostics.ExceptionSummarization/Microsoft.Extensions.Diagnostics.ExceptionSummarization.csproj
index 0073e039f8f..4b4993a7b99 100644
--- a/src/Libraries/Microsoft.Extensions.Diagnostics.ExceptionSummarization/Microsoft.Extensions.Diagnostics.ExceptionSummarization.csproj
+++ b/src/Libraries/Microsoft.Extensions.Diagnostics.ExceptionSummarization/Microsoft.Extensions.Diagnostics.ExceptionSummarization.csproj
@@ -3,6 +3,7 @@
     <RootNamespace>Microsoft.Extensions.Diagnostics.ExceptionSummarization</RootNamespace>
     <Description>Lets you retrieve exception summary information.</Description>
     <Workstream>Telemetry</Workstream>
+    <TargetFrameworks>$(NetCoreTargetFrameworks);netstandard2.0;net462</TargetFrameworks>
   </PropertyGroup>
 
   <PropertyGroup>
diff --git a/src/Libraries/Microsoft.Extensions.Http.Diagnostics/Microsoft.Extensions.Http.Diagnostics.csproj b/src/Libraries/Microsoft.Extensions.Http.Diagnostics/Microsoft.Extensions.Http.Diagnostics.csproj
index cc00c907ded..6e4e3d2fc24 100644
--- a/src/Libraries/Microsoft.Extensions.Http.Diagnostics/Microsoft.Extensions.Http.Diagnostics.csproj
+++ b/src/Libraries/Microsoft.Extensions.Http.Diagnostics/Microsoft.Extensions.Http.Diagnostics.csproj
@@ -3,6 +3,7 @@
     <RootNamespace>Microsoft.Extensions.Http.Diagnostics</RootNamespace>
     <Description>Telemetry support for HTTP Client.</Description>
     <Workstream>Telemetry</Workstream>
+    <TargetFrameworks>$(NetCoreTargetFrameworks);netstandard2.0;net462</TargetFrameworks>
   </PropertyGroup>
 
   <PropertyGroup>
diff --git a/src/Libraries/Microsoft.Extensions.Http.Resilience/Microsoft.Extensions.Http.Resilience.csproj b/src/Libraries/Microsoft.Extensions.Http.Resilience/Microsoft.Extensions.Http.Resilience.csproj
index b0b16eb4020..70ca704e622 100644
--- a/src/Libraries/Microsoft.Extensions.Http.Resilience/Microsoft.Extensions.Http.Resilience.csproj
+++ b/src/Libraries/Microsoft.Extensions.Http.Resilience/Microsoft.Extensions.Http.Resilience.csproj
@@ -29,7 +29,7 @@
   <PropertyGroup>
     <!-- Disable "Published symbols cannot be deleted to maintain compatibility" warning
          because we have different APIs for different TFMs. -->
-    <NoWarn Condition="'$(TargetFramework)' == 'net462'">$(NoWarn);LA0006</NoWarn>
+    <NoWarn Condition="'$(TargetFramework)' == 'netstandard2.0' OR '$(TargetFramework)' == 'net462'">$(NoWarn);LA0006</NoWarn>
   </PropertyGroup>
 
   <ItemGroup>

From 3a7388b3cae6e24f1bfcf7ef6a27dc4ba1c8d6ad Mon Sep 17 00:00:00 2001
From: evgenyfedorov2 <25526458+evgenyfedorov2@users.noreply.github.com>
Date: Tue, 8 Jul 2025 10:11:43 +0200
Subject: [PATCH 3/3] Fix

---
 .../Latency/Internal/HttpRequestLatencyListener.cs        | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/Libraries/Microsoft.Extensions.Http.Diagnostics/Latency/Internal/HttpRequestLatencyListener.cs b/src/Libraries/Microsoft.Extensions.Http.Diagnostics/Latency/Internal/HttpRequestLatencyListener.cs
index 214d877b92e..5d7238ed8a3 100644
--- a/src/Libraries/Microsoft.Extensions.Http.Diagnostics/Latency/Internal/HttpRequestLatencyListener.cs
+++ b/src/Libraries/Microsoft.Extensions.Http.Diagnostics/Latency/Internal/HttpRequestLatencyListener.cs
@@ -33,8 +33,16 @@ public void Enable()
     {
         if (Interlocked.CompareExchange(ref _enabled, 1, 0) == 0)
         {
+#if NETSTANDARD
+            foreach (var eventSource in EventSource.GetSources())
+            {
+                OnEventSourceCreated(eventSource.Name, eventSource);
+            }
+#else
             // process already existing listeners once again
             EventSourceCreated += (_, args) => OnEventSourceCreated(args.EventSource!);
+#endif
+
         }
     }