Matrix versions

.github/workflows/dotnet.yml

@@ -1,6 +1,3 @@
-# This workflow will build a .NET project
-# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-net
-
 name: .NET
 
 on:
@@ -12,15 +9,31 @@ jobs:
 
     runs-on: ubuntu-latest
 
+    strategy:
+      matrix:
+        dotnet-version: [6.0.x, 7.0.x, 8.0.x, 9.0.x] # Test on multiple .NET versions
+
     steps:
     - uses: actions/checkout@v4
+    
     - name: Setup .NET
       uses: actions/setup-dotnet@v4
       with:
-        dotnet-version: 8.0.x
+        dotnet-version: ${{ matrix.dotnet-version }}
+
+    - name: Cache .NET packages
+      uses: actions/cache@v3
+      with:
+        path: ~/.nuget/packages
+        key: ${{ runner.os }}-nuget-${{ hashFiles('**/*.csproj') }}
+        restore-keys: |
+          ${{ runner.os }}-nuget-
+
     - name: Restore dependencies
       run: dotnet restore
+
     - name: Build
-      run: dotnet build --no-restore
+      run: dotnet build --no-restore --configuration Release
+
     - name: Test
       run: dotnet test GangsTest --no-build --verbosity normal