From a96612bf11ab1ebaaaa21954f987567e3a7a1041 Mon Sep 17 00:00:00 2001
From: Viktor Hofer <7412651+ViktorHofer@users.noreply.github.com>
Date: Thu, 27 Aug 2026 08:46:20 +0200
Subject: [PATCH 1/2] Revert "Revert "Add multi-threading option to build
 response file" (#14851)"

This reverts commit 9873fa49dd924071cc0b66efe3480a2e0adea7d7.
---
 Directory.Build.rsp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Directory.Build.rsp b/Directory.Build.rsp
index e32f4d6b290..f48a27721de 100644
--- a/Directory.Build.rsp
+++ b/Directory.Build.rsp
@@ -1 +1 @@
-/verbosity:minimal /m /clp:Summary
\ No newline at end of file
+/verbosity:minimal /m /clp:Summary /mt

From 2ebfa4294bd20bf5e43e720d582e12ae6879a884 Mon Sep 17 00:00:00 2001
From: Viktor Hofer <7412651+ViktorHofer@users.noreply.github.com>
Date: Thu, 27 Aug 2026 09:01:23 +0200
Subject: [PATCH 2/2] Update yml entrypoints

---
 .vsts-dotnet-ci.yml | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/.vsts-dotnet-ci.yml b/.vsts-dotnet-ci.yml
index 3bbbb1c9e3d..fcdd480ad72 100644
--- a/.vsts-dotnet-ci.yml
+++ b/.vsts-dotnet-ci.yml
@@ -42,10 +42,10 @@ jobs:
       env:
         Token: $(dn-bot-dnceng-artifact-feeds-rw)
   - task: BatchScript@1
-    displayName: Build (with -mt in stage2)
+    displayName: Build (with stage2)
     inputs:
       filename: 'build.cmd'
-      arguments: '-ci -test -stage2Argument /mt'
+      arguments: '-ci -test -stage2'
     condition: eq(variables.onlyDocChanged, 0)
 # Task to collect code coverage on Windows. Disabled by default due to being unstable and sometimes it stucks forever
 #   - task: PowerShell@2
@@ -153,10 +153,10 @@ jobs:
       env:
         Token: $(dn-bot-dnceng-artifact-feeds-rw)
   - task: BatchScript@1
-    displayName: Build (with -mt in stage2)
+    displayName: Build (with stage2)
     inputs:
       filename: 'build.cmd'
-      arguments: '-msbuildEngine dotnet -ci -test -stage2Argument /mt'
+      arguments: '-msbuildEngine dotnet -ci -test -stage2'
     condition: eq(variables.onlyDocChanged, 0)
     env:
       MSBUILDUSESERVER: "1"
@@ -235,8 +235,8 @@ jobs:
   - bash: sudo apt-get update
   - bash: sudo apt-get install -y libxml2
   # Intentionally not running tests
-  - bash: . 'build.sh' --ci --stage2Argument '/mt' --stage2Argument '/p:BuildAnalyzer=true'
-    displayName: Build (with -mt in stage2)
+  - bash: . 'build.sh' --ci --stage2 --stage2Argument '/p:BuildAnalyzer=true'
+    displayName: Build (with stage2)
     condition: eq(variables.onlyDocChanged, 0)
     env:
       MSBUILDUSESERVER: "1"
@@ -351,8 +351,8 @@ jobs:
         Token: $(dn-bot-dnceng-artifact-feeds-rw)
   - bash: sudo apt-get update
   - bash: sudo apt-get install -y libxml2
-  - bash: . 'build.sh' --ci --test --stage2Argument '/mt'
-    displayName: Build (with -mt in stage2)
+  - bash: . 'build.sh' --ci --test --stage2
+    displayName: Build (with stage2)
     condition: eq(variables.onlyDocChanged, 0)
     env:
         MSBUILDUSESERVER: "1"
@@ -440,8 +440,8 @@ jobs:
         arguments: $(Build.SourcesDirectory)/NuGet.config $Token
       env:
         Token: $(dn-bot-dnceng-artifact-feeds-rw)
-  - bash: . 'build.sh' --ci --test --stage2Argument '/mt'
-    displayName: Build (with -mt in stage2)
+  - bash: . 'build.sh' --ci --test --stage2
+    displayName: Build (with stage2)
     condition: eq(variables.onlyDocChanged, 0)
     env:
         MSBUILDUSESERVER: "1"