test autobuild for csharp

Author: fadi-george

.github/workflows/codeql.yml

@@ -46,7 +46,10 @@ jobs:
           - language: actions
             build-mode: none
           - language: csharp
-            build-mode: none
+            build-mode: autobuild
+            # Using autobuild to improve analysis quality (dependency resolution).
+            # If autobuild fails (Unity packages may not have .csproj files),
+            # consider switching to 'none' and accepting lower quality metrics.
           # c-cpp and Swift analysis removed: Unity SDKs don't include build projects in the repo
           # (Unity generates Xcode/Android projects during build). CodeQL's C/C++ autobuilder
           # doesn't recognize .mm (Objective-C++) files as source files. The minimal native
@@ -66,8 +69,11 @@ jobs:
       # Add any setup steps before running the `github/codeql-action/init` action.
       # This includes steps like installing compilers or runtimes (`actions/setup-node`
       # or others). This is typically only required for manual builds.
-      # - name: Setup runtime (example)
-      #   uses: actions/setup-example@v1
+      - name: Setup .NET
+        if: matrix.language == 'csharp'
+        uses: actions/setup-dotnet@v5
+        with:
+          dotnet-version: "6.0.x"
 
       # Initializes the CodeQL tools for scanning.
       - name: Initialize CodeQL
@@ -83,23 +89,6 @@ jobs:
           # Consider enabling security queries for better coverage:
           # queries: security-extended,security-and-quality
 
-      # If the analyze step fails for one of the languages you are analyzing with
-      # "We were unable to automatically build your code", modify the matrix above
-      # to set the build mode to "manual" for that language. Then modify this step
-      # to build your code.
-      # ℹ️ Command-line programs to run using the OS shell.
-      # 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
-      - name: Run manual build steps
-        if: matrix.build-mode == 'manual'
-        shell: bash
-        run: |
-          echo 'If you are using a "manual" build mode for one or more of the' \
-            'languages you are analyzing, replace this with the commands to build' \
-            'your code, for example:'
-          echo '  make bootstrap'
-          echo '  make release'
-          exit 1
-
       - name: Perform CodeQL Analysis
         uses: github/codeql-action/analyze@v4
         with: