ci: add C# to packaging.yml (apache#1636)

Fixes apache#750.

.github/workflows/packaging.yml

@@ -120,6 +120,47 @@ jobs:
           path: |
             apache-arrow-adbc-${{ steps.version.outputs.VERSION }}.tar.gz
 
+  csharp:
+    name: "C#/.NET"
+    runs-on: ubuntu-latest
+    needs:
+      - source
+    steps:
+      - uses: actions/download-artifact@v3
+        with:
+          name: source
+
+      - name: Extract source archive
+        run: |
+          source_archive=$(echo apache-arrow-adbc-*.tar.gz)
+          VERSION=${source_archive#apache-arrow-adbc-}
+          VERSION=${VERSION%.tar.gz}
+          echo "VERSION=${VERSION}" >> $GITHUB_ENV
+
+          tar xf apache-arrow-adbc-${VERSION}.tar.gz
+          mv apache-arrow-adbc-${VERSION} adbc
+
+      - name: Show inputs
+        run: |
+          echo "upload_artifacts: ${{ inputs.upload_artifacts }}" >> $GITHUB_STEP_SUMMARY
+          echo "schedule: ${{ github.event.schedule }}" >> $GITHUB_STEP_SUMMARY
+          echo "ref: ${{ github.ref }}" >> $GITHUB_STEP_SUMMARY
+
+      - name: Package
+        run: |
+          pushd adbc/
+          docker compose run csharp-dist
+          popd
+
+      - name: Archive nupkg
+        uses: actions/upload-artifact@v3
+        with:
+          name: csharp
+          retention-days: 7
+          path: |
+            adbc/csharp/artifacts/**/*.nupkg
+            adbc/csharp/artifacts/**/*.snupkg
+
   docs:
     name: Documentation
     runs-on: ubuntu-latest

CONTRIBUTING.md

@@ -148,6 +148,15 @@ for details.
 [cmake-prefix-path]: https://cmake.org/cmake/help/latest/variable/CMAKE_PREFIX_PATH.html
 [gtest]: https://github.com/google/googletest/
 
+### C#/.NET
+
+Make sure [.NET Core is installed](https://dotnet.microsoft.com/en-us/download).
+
+```shell
+$ cd csharp
+$ dotnet build
+```
+
 ### Documentation
 
 The documentation uses the [Sphinx][sphinx] documentation generator.

docker-compose.yml

@@ -21,6 +21,15 @@ services:
   # These reuse Arrow's images for simplicity. You won't be able to
   # build the image from here.
 
+  ############################### C#/.NET ######################################
+
+  csharp-dist:
+    image: mcr.microsoft.com/dotnet/sdk:7.0
+    volumes:
+      - .:/adbc:delegated
+    command: |
+      /adbc/ci/scripts/csharp_pack.sh /adbc
+
   ############################ Documentation ###################################
 
   docs: