From 183d989755e6ef95e29bb84102c5eaab8a973eec Mon Sep 17 00:00:00 2001
From: Jonathan Peppers <jonathan.peppers@microsoft.com>
Date: Thu, 28 May 2026 08:59:33 -0500
Subject: [PATCH] Add RollForward=Major to test projects

The hosted build agents have been updated and no longer have the .NET 9 x64 runtime installed (only x86), so net9.0 test apps fail to launch with:

  You must install or update .NET to run this application.
  Framework: 'Microsoft.NETCore.App', version '9.0.0' (x64)

Setting RollForward=Major allows the net9.0 testhost to run on the .NET 10 runtime that is installed on the agent.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
---
 tests/Directory.Build.props | 3 +++
 util/Directory.Build.props  | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/tests/Directory.Build.props b/tests/Directory.Build.props
index d65e92b58..1e4d760cb 100644
--- a/tests/Directory.Build.props
+++ b/tests/Directory.Build.props
@@ -4,5 +4,8 @@
   <PropertyGroup>
     <!-- Default TFM's we build for -->
     <_DefaultNetTargetFramework>net9.0</_DefaultNetTargetFramework>
+    <!-- Allow tests to run on newer runtimes (e.g. .NET 10) when the targeted
+         runtime isn't installed on the build agent. -->
+    <RollForward>Major</RollForward>
   </PropertyGroup>
 </Project>
diff --git a/util/Directory.Build.props b/util/Directory.Build.props
index 3d7677b28..3c18d566d 100644
--- a/util/Directory.Build.props
+++ b/util/Directory.Build.props
@@ -3,6 +3,9 @@
   which is tuned for building bindings packages. -->
   <PropertyGroup>
     <_DefaultNetTargetFramework>net9.0</_DefaultNetTargetFramework>
+    <!-- Allow tests/tools to run on newer runtimes (e.g. .NET 10) when the
+         targeted runtime isn't installed on the build agent. -->
+    <RollForward>Major</RollForward>
     <!-- Duplicate of root Directory.Build.props -->
     <MSBuildPackageReferenceVersion Condition=" '$(MSBuildPackageReferenceVersion)' == '' ">17.13.9</MSBuildPackageReferenceVersion>
   </PropertyGroup>