Update project to .NET 8 (#270)

* Update project to .NET 8

Signed-off-by: Victor Chang <[email protected]>

.github/workflows/ci.yml

@@ -41,7 +41,7 @@ jobs:
         fetch-depth: 0
     - uses: actions/setup-dotnet@v3
       with:
-        dotnet-version: "6.0.x"
+        dotnet-version: "8.0.x"
 
     - name: Enable Homebrew
       run: echo "/home/linuxbrew/.linuxbrew/bin:/home/linuxbrew/.linuxbrew/sbin" >> $GITHUB_PATH
@@ -102,7 +102,7 @@ jobs:
 
       - uses: actions/setup-dotnet@v3
         with:
-          dotnet-version: "6.0.x"
+          dotnet-version: "8.0.x"
 
       - name: Enable NuGet cache
         uses: actions/[email protected]
@@ -146,7 +146,7 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
-        run: find ~+ -type f -name "*.Test.csproj" | xargs -L1 dotnet test -c ${{ env.BUILD_CONFIG }} -v=minimal -r "${{ env.TEST_RESULTS }}" --collect:"XPlat Code Coverage" --settings coverlet.runsettings
+        run: find ~+ -type f -name "*.Tests.csproj" | xargs -L1 dotnet test -c ${{ env.BUILD_CONFIG }} -v=minimal --results-directory "${{ env.TEST_RESULTS }}" --collect:"XPlat Code Coverage" --settings coverlet.runsettings
         working-directory: ./src
 
       - name: Stop docker-compose
@@ -163,7 +163,7 @@ jobs:
       - uses: codecov/codecov-action@v3
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
-          directory: "src/${{ env.TEST_RESULTS }}"
+          directory: "src/"
           files: "**/coverage.opencover.xml"
           flags: unittests
           name: codecov-umbrella
@@ -195,7 +195,7 @@ jobs:
 
       - uses: actions/setup-dotnet@v3
         with:
-          dotnet-version: "6.0.x"
+          dotnet-version: "8.0.x"
 
       - name: Enable NuGet cache
         uses: actions/[email protected]
@@ -275,7 +275,7 @@ jobs:
         env:
           NUGET_AUTH_TOKEN: ${{secrets.GITHUB_TOKEN}}
         with:
-          dotnet-version: "6.0.x"
+          dotnet-version: "8.0.x"
           source-url: https://nuget.pkg.github.com/Project-MONAI/index.json
 
       - name: Publish to GitHub
@@ -300,7 +300,7 @@ jobs:
         env:
           NUGET_AUTH_TOKEN: ${{secrets.GITHUB_TOKEN}}
         with:
-          dotnet-version: "6.0.x"
+          dotnet-version: "8.0.x"
           source-url: https://nuget.pkg.github.com/Project-MONAI/index.json
 
       - name: Publish to GitHub