Updated to .NET 9

Author: KoenZomers

.github/workflows/dotnetcore.yml

@@ -12,17 +12,25 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
-    - name: Setup .NET Core
-      uses: actions/setup-dotnet@v1
-      with:
-        dotnet-version: 3.1.101 
+    - name: Checkout code
+    - uses: actions/checkout@v4
+
+    - name: Setup .NET 9 SDK
+      uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: '9.0.x'
+       
+    - name: Restore dependencies
+      run: dotnet restore
+
     - name: Build Api
-      run: dotnet build "Api/Api.csproj" --configuration Release --framework netcoreapp2.0
+      run: dotnet build "Api/Api.csproj" --no-restore --configuration Release
+      
     - name: Copy sample config file to allow for the build to succeed
       uses: canastro/copy-file-action@master
       with:
         source: "UnitTestProject/App.sample.config"
-        target: "UnitTestProject/app.config"         
+        target: "UnitTestProject/app.config"  
+        
     - name: Build UnitTest
-      run: dotnet build "UnitTestProject/UnitTestProject.csproj" --configuration Release --framework netcoreapp3.1      
+      run: dotnet build "UnitTestProject/UnitTestProject.csproj" --configuration Release