Fix build for .net framework

Author: Ivan Kamkin

.github/workflows/net-framework.yml

@@ -35,7 +35,7 @@ jobs:
       uses: darenm/Setup-VSTest@v1.2
 
     - name: Build the Solution
-      run: msbuild -restore -p:Configuration=Release
+      run: msbuild -restore -p:Configuration=Release -p:TargetFramework=${{ matrix.framework }}
 
     - name: Test with VSTest
       run: |