Add pr-validation

.github/workflows/pr-validation.yml

@@ -0,0 +1,33 @@
+name: pr-validation
+
+on: pull_request
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [windows-latest, ubuntu-latest, macos-latest]
+    steps:
+    - uses: actions/checkout@v4
+    - uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: '3.1.x'
+    - uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: '5.x'
+    - uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: '6.x'
+    - uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: '7.x'
+    - uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: '8.x'
+    - run: dotnet build DacFx.sln
+    - run: dotnet test -f netcoreapp3.1
+    - run: dotnet test -f net5.0
+    - run: dotnet test -f net6.0
+    - run: dotnet test -f net7.0
+    - run: dotnet test -f net8.0