From 8d9b15bd5fe8573c2ea7cee33fdbb7b45a6c6c13 Mon Sep 17 00:00:00 2001
From: Thorsten Sommer <SommerEngineering@users.noreply.github.com>
Date: Sun, 25 Oct 2026 19:10:21 +0100
Subject: [PATCH] Fixed CI building with a newer .NET SDK than the metadata
 names (#1107)

---
 .github/workflows/build-and-release.yml       | 24 +++++++++++++++++++
 .../ClassicRagOutboundDataRestrictionTests.cs |  7 ++++--
 2 files changed, 29 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/build-and-release.yml b/.github/workflows/build-and-release.yml
index a3281141e..b7072e818 100644
--- a/.github/workflows/build-and-release.yml
+++ b/.github/workflows/build-and-release.yml
@@ -803,6 +803,18 @@ jobs:
           cache: true
           cache-dependency-path: 'app/MindWork AI Studio/packages.lock.json'
 
+      - name: Pin the .NET SDK from the metadata
+        shell: bash
+        run: |
+          # The runner images bring several .NET SDKs along, newer ones among them. Without a
+          # global.json, the newest of them builds instead of the one installed above from the
+          # metadata, and with it comes a newer C# version than the one we build with locally.
+          # The file exists in the pipeline only, so metadata.txt stays the one place which names
+          # the SDK. Bash runs on Windows as well, so that a failing command fails the step:
+          dotnet new globaljson --sdk-version "${DOTNET_SDK_VERSION}" --roll-forward disable --force
+          used_dotnet_sdk_version=$(dotnet --version)
+          echo ".NET SDK in use: '${used_dotnet_sdk_version}'"
+
       - name: Cache Rust
         uses: actions/cache@v4
         with:
@@ -1055,6 +1067,18 @@ jobs:
           cache: true
           cache-dependency-path: 'app/MindWork AI Studio/packages.lock.json'
 
+      - name: Pin the .NET SDK from the metadata
+        shell: bash
+        run: |
+          # The runner images bring several .NET SDKs along, newer ones among them. Without a
+          # global.json, the newest of them builds instead of the one installed above from the
+          # metadata, and with it comes a newer C# version than the one we build with locally.
+          # The file exists in the pipeline only, so metadata.txt stays the one place which names
+          # the SDK. Bash runs on Windows as well, so that a failing command fails the step:
+          dotnet new globaljson --sdk-version "${DOTNET_SDK_VERSION}" --roll-forward disable --force
+          used_dotnet_sdk_version=$(dotnet --version)
+          echo ".NET SDK in use: '${used_dotnet_sdk_version}'"
+
       - name: Deploy PDFium (Unix)
         if: matrix.platform != 'windows-latest'
         env:
diff --git a/app/Tests/Tools/ClassicRagOutboundDataRestrictionTests.cs b/app/Tests/Tools/ClassicRagOutboundDataRestrictionTests.cs
index 490fb7c7e..923b854aa 100644
--- a/app/Tests/Tools/ClassicRagOutboundDataRestrictionTests.cs
+++ b/app/Tests/Tools/ClassicRagOutboundDataRestrictionTests.cs
@@ -68,10 +68,13 @@ public sealed class ClassicRagOutboundDataRestrictionTests : ToolRegistryTestBas
     {
         //
         // Semantic Search offers the data sources in a fixed order, while the selection agent of the
-        // classic process may return them in any order. Both have to name the same data source:
+        // classic process may return them in any order. Both have to name the same data source.
+        //
+        // AsEnumerable() keeps Reverse() a reversed copy: from C# 14 on, Reverse() on an array
+        // reverses the array in place and returns nothing.
         //
         var classicChat = new ChatThread();
-        AISrcSelWithRetCtxVal.RequireOutboundDataRestriction(classicChat, dataSources.Reverse().ToArray(), passageCounts.Reverse().ToArray(), organizationMinimum);
+        AISrcSelWithRetCtxVal.RequireOutboundDataRestriction(classicChat, [..dataSources.AsEnumerable().Reverse()], [..passageCounts.AsEnumerable().Reverse()], organizationMinimum);
 
         var semanticSearchChat = new ChatThread();
         semanticSearchChat.RequireOutboundDataRestriction(SemanticSearchTool.GetRequirements(dataSources, passageCounts, organizationMinimum).OutboundData);