diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
@@ -5,47 +5,23 @@ on: [ pull_request, push ]
jobs:
  build-test:
    name: Build and Test
-    runs-on: ubuntu-16.04

    strategy:
      matrix:
-        python: [3.6,3.7,3.8,3.9]
-        shutdown_mode: [Normal,Soft]
-        toolset: [Mono,.NET]
-        include:
-          - toolset: .NET
-            BUILD_OPTS: --xplat
-            RUN_TESTS: dotnet
-            EMBED_TESTS_PATH: netcoreapp3.1_publish/
-            PERF_TESTS_PATH: net461/
-          - toolset: Mono
-            BUILD_OPTS: ""
-            RUN_TESTS: "mono ./packages/NUnit.*/tools/nunit3-console.exe"
-            EMBED_TESTS_PATH: ""
-            PERF_TESTS_PATH: ""
-
    env:
-      BUILD_OPTS: ${{ matrix.BUILD_OPTS }}
-      RUN_TESTS: ${{ matrix.RUN_TESTS }}
-      EMBED_TESTS_PATH: ${{ matrix.EMBED_TESTS_PATH }}
-      PERF_TESTS_PATH: ${{ matrix.PERF_TESTS_PATH }}
      PYTHONNET_SHUTDOWN_MODE: ${{ matrix.SHUTDOWN_MODE }}

    steps:
      - name: Checkout code
        uses: actions/checkout@v2

-      - name: Install Mono
-        if: ${{ matrix.toolset == 'Mono' }}
-        run: |
-          sudo apt update
-          sudo apt install mono-devel ca-certificates-mono -y
-
-      - name: Install .NET
-        if: ${{ matrix.toolset == '.NET' }}
        uses: actions/setup-dotnet@v1
-        with:
-          dotnet-version: 3.1.x

      - name: Set up Python ${{ matrix.python }}
        uses: actions/setup-python@v2
@@ -54,16 +30,19 @@ jobs:

      - name: Install dependencies
        run: |
-          pip install --upgrade setuptools # TEMP - due to setuptools 36.2.0 bug
          pip install --upgrade -r requirements.txt

-      - name: Install
        run: |
-          echo $BUILD_OPTS
-          python setup.py install $BUILD_OPTS

      - name: Python Tests
        run: pytest

-      - name: .NET Tests
-        run: $RUN_TESTS src/embed_tests/bin/$EMBED_TESTS_PATH/Python.EmbeddingTest.dll --labels=All
diff --git a/Directory.Build.props b/Directory.Build.props
@@ -0,0 +1,17 @@
diff --git a/appveyor.yml b/appveyor.yml
@@ -10,19 +10,11 @@ platform:

environment:
  global:
-    PYTHONUNBUFFERED: True
    PYTHONWARNINGS: 'ignore:::wheel.pep425tags:'
    CODECOV_ENV: PYTHON_VERSION, PLATFORM

  matrix:
-    - PYTHON_VERSION: 3.9
-      BUILD_OPTS: --xplat
-    - PYTHON_VERSION: 3.8
-      BUILD_OPTS: --xplat
-    - PYTHON_VERSION: 3.7
-      BUILD_OPTS: --xplat
-    - PYTHON_VERSION: 3.6
-      BUILD_OPTS: --xplat
    - PYTHON_VERSION: 3.9
    - PYTHON_VERSION: 3.8
    - PYTHON_VERSION: 3.7
@@ -47,35 +39,18 @@ init:
install:
  - python -m pip install -U pip
  - pip install --upgrade -r requirements.txt --quiet
-  - pip install pycparser --quiet
-
-  # Install OpenCover. Can't put on `packages.config`, not Mono compatible
-  - .\tools\nuget\nuget.exe install OpenCover -OutputDirectory packages -Verbosity quiet

build_script:
  # Create clean `sdist`. Only used for releases
  - python setup.py --quiet sdist
-  # Build `wheel` with coverage of `setup.py`
-  - coverage run setup.py bdist_wheel %BUILD_OPTS%

test_script:
  - pip install --no-index --find-links=.\dist\ pythonnet
-  - ps: .\ci\appveyor_run_tests.ps1
-
-on_finish:
-  # Temporary disable multiple upload due to codecov limit of 20 per commit.
-  # https://docs.codecov.io/blog/week-8-2017
-  - coverage xml -i
-  # - codecov --file coverage.xml --flags setup_windows
-  # - codecov --file py.coverage --flags python_tests
-  # - codecov --file cs.coverage --flags embedded_tests
-  - codecov --file py.coverage cs.coverage coverage.xml --flags setup_windows

artifacts:
  - path: dist\*
-  - path: '.\src\runtime\bin\*.nupkg'
-
-notifications:
-  - provider: Slack
-    incoming_webhook:
-      secure: 2S/t6rGHdbwoxehnvn5KgfsHrBFEtwnPD7M5olGErmz70oWFVpqoWd/EvDwh7rKZGdOTjDmpwcukc2xi5VRaGHbBAqFYS3tAdgAMrcaTNWs=
diff --git a/clr.py b/clr.py
@@ -0,0 +1,41 @@
diff --git a/pyproject.toml b/pyproject.toml
@@ -0,0 +1,3 @@