From 4889bd31319e916848e1402b8f93d985c9b41e0c Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 14 Jan 2026 21:14:28 +0000
Subject: [PATCH 1/4] Initial plan


From d65bfbefc2ce70affbdaa15eaca536b83246fb1a Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 14 Jan 2026 21:22:45 +0000
Subject: [PATCH 2/4] Fix AnalysisLevel latest to use 10.0 rules instead of 9.0

- Update _LatestAnalysisLevel from 9.0 to 10.0
- Update _PreviewAnalysisLevel from 10.0 to 11.0
- Unskip the preview analysis level test
- Add test cases for version 10.0

Co-authored-by: baronfel <573979+baronfel@users.noreply.github.com>
---
 .../targets/Microsoft.NET.Sdk.Analyzers.targets             | 4 ++--
 .../GivenThatWeWantToFloatWarningLevels.cs                  | 6 +++++-
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.Sdk.Analyzers.targets b/src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.Sdk.Analyzers.targets
index bfe44a366470..0c206deb1e52 100644
--- a/src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.Sdk.Analyzers.targets
+++ b/src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.Sdk.Analyzers.targets
@@ -22,8 +22,8 @@ Copyright (c) .NET Foundation. All rights reserved.
 
     <_NoneAnalysisLevel>4.0</_NoneAnalysisLevel>
     <!-- When the base TFM of the platform bumps, these must be bumped as well. Preview should always be the 'next' TFM. -->
-    <_LatestAnalysisLevel>9.0</_LatestAnalysisLevel>
-    <_PreviewAnalysisLevel>10.0</_PreviewAnalysisLevel>
+    <_LatestAnalysisLevel>10.0</_LatestAnalysisLevel>
+    <_PreviewAnalysisLevel>11.0</_PreviewAnalysisLevel>
 
     <AnalysisLevel Condition="'$(AnalysisLevel)' == '' And
                               '$(TargetFrameworkIdentifier)' == '.NETCoreApp' And
diff --git a/test/Microsoft.NET.Build.Tests/GivenThatWeWantToFloatWarningLevels.cs b/test/Microsoft.NET.Build.Tests/GivenThatWeWantToFloatWarningLevels.cs
index dce92c1248c8..fe2bdcfdd965 100644
--- a/test/Microsoft.NET.Build.Tests/GivenThatWeWantToFloatWarningLevels.cs
+++ b/test/Microsoft.NET.Build.Tests/GivenThatWeWantToFloatWarningLevels.cs
@@ -162,7 +162,7 @@ static void Main()
         // Fixing this test requires bumping _LatestAnalysisLevel and _PreviewAnalysisLevel
         // Bumping will cause It_maps_analysis_properties_to_globalconfig to fail which requires changes in dotnet/roslyn-analyzers repo.
         // See instructions in the comment in It_maps_analysis_properties_to_globalconfig
-        [RequiresMSBuildVersionTheory("16.8", Skip = "https://github.com/dotnet/sdk/issues/45299")]
+        [RequiresMSBuildVersionTheory("16.8")]
         public void It_defaults_preview_AnalysisLevel_to_the_next_tfm(string currentTFM, string nextTFMVersionNumber)
         {
             var testProject = new TestProject
@@ -277,6 +277,10 @@ static void Main()
         [InlineData("9.0", "", "true", "")]
         [InlineData("9", "default", "false", "Security")]
         [InlineData("9.0", "", "true", "Usage")]
+        [InlineData("10", "default", "false", "")]
+        [InlineData("10.0", "", "true", "")]
+        [InlineData("10", "default", "false", "Security")]
+        [InlineData("10.0", "", "true", "Usage")]
         [RequiresMSBuildVersionTheory("16.8")]
         public void It_maps_analysis_properties_to_globalconfig(string analysisLevel, string analysisMode, string codeAnalysisTreatWarningsAsErrors, string category)
         {

From 88cd1a1688e678dbdfd3a0ed4324f418ae7ad59c Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 14 Jan 2026 21:52:17 +0000
Subject: [PATCH 3/4] Update AnalysisLevel to 11.0/12.0 for main branch and add
 11.0 tests

- Changed _LatestAnalysisLevel from 10.0 to 11.0
- Changed _PreviewAnalysisLevel from 11.0 to 12.0
- Added test cases for version 11.0

Note: The 11.0 tests will fail until the roslyn-analyzers package is updated with 11.0 globalconfig files, as documented in the test comments.

Co-authored-by: baronfel <573979+baronfel@users.noreply.github.com>
---
 .../targets/Microsoft.NET.Sdk.Analyzers.targets               | 4 ++--
 .../GivenThatWeWantToFloatWarningLevels.cs                    | 4 ++++
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.Sdk.Analyzers.targets b/src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.Sdk.Analyzers.targets
index 0c206deb1e52..fe02a6d3d962 100644
--- a/src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.Sdk.Analyzers.targets
+++ b/src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.Sdk.Analyzers.targets
@@ -22,8 +22,8 @@ Copyright (c) .NET Foundation. All rights reserved.
 
     <_NoneAnalysisLevel>4.0</_NoneAnalysisLevel>
     <!-- When the base TFM of the platform bumps, these must be bumped as well. Preview should always be the 'next' TFM. -->
-    <_LatestAnalysisLevel>10.0</_LatestAnalysisLevel>
-    <_PreviewAnalysisLevel>11.0</_PreviewAnalysisLevel>
+    <_LatestAnalysisLevel>11.0</_LatestAnalysisLevel>
+    <_PreviewAnalysisLevel>12.0</_PreviewAnalysisLevel>
 
     <AnalysisLevel Condition="'$(AnalysisLevel)' == '' And
                               '$(TargetFrameworkIdentifier)' == '.NETCoreApp' And
diff --git a/test/Microsoft.NET.Build.Tests/GivenThatWeWantToFloatWarningLevels.cs b/test/Microsoft.NET.Build.Tests/GivenThatWeWantToFloatWarningLevels.cs
index fe2bdcfdd965..0c9225a7edab 100644
--- a/test/Microsoft.NET.Build.Tests/GivenThatWeWantToFloatWarningLevels.cs
+++ b/test/Microsoft.NET.Build.Tests/GivenThatWeWantToFloatWarningLevels.cs
@@ -281,6 +281,10 @@ static void Main()
         [InlineData("10.0", "", "true", "")]
         [InlineData("10", "default", "false", "Security")]
         [InlineData("10.0", "", "true", "Usage")]
+        [InlineData("11", "default", "false", "")]
+        [InlineData("11.0", "", "true", "")]
+        [InlineData("11", "default", "false", "Security")]
+        [InlineData("11.0", "", "true", "Usage")]
         [RequiresMSBuildVersionTheory("16.8")]
         public void It_maps_analysis_properties_to_globalconfig(string analysisLevel, string analysisMode, string codeAnalysisTreatWarningsAsErrors, string category)
         {

From 29b5fa38f596db02fb53733c8ffa85297fb2433a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alexander=20K=C3=B6plinger?= <alex.koeplinger@outlook.com>
Date: Thu, 12 Feb 2026 15:48:56 +0100
Subject: [PATCH 4/4] Fix merge

---
 .../GivenThatWeWantToFloatWarningLevels.cs                    | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/test/Microsoft.NET.Build.Tests/GivenThatWeWantToFloatWarningLevels.cs b/test/Microsoft.NET.Build.Tests/GivenThatWeWantToFloatWarningLevels.cs
index 62c03060fd47..342a4f254de8 100644
--- a/test/Microsoft.NET.Build.Tests/GivenThatWeWantToFloatWarningLevels.cs
+++ b/test/Microsoft.NET.Build.Tests/GivenThatWeWantToFloatWarningLevels.cs
@@ -158,12 +158,12 @@ static void Main()
             buildResult.StdErr.Should().Be(string.Empty);
         }
 
-        [InlineData(ToolsetInfo.CurrentTargetFramework, ToolsetInfo.NextTargetFrameworkVersion)]
+        [InlineData(ToolsetInfo.CurrentTargetFramework)]
         // Fixing this test requires bumping _LatestAnalysisLevel and _PreviewAnalysisLevel
         // Bumping will cause It_maps_analysis_properties_to_globalconfig to fail which requires changes in dotnet/roslyn-analyzers repo.
         // See instructions in the comment in It_maps_analysis_properties_to_globalconfig
         [RequiresMSBuildVersionTheory("16.8")]
-        public void It_defaults_preview_AnalysisLevel_to_the_next_tfm(string currentTFM, string nextTFMVersionNumber)
+        public void It_defaults_preview_AnalysisLevel_to_the_next_tfm(string currentTFM)
         {
             var testProject = new TestProject
             {