chore(Integration tests): Add C# constructs to integration test project

[richardwerkman]

closes #2920

[richardwerkman]

It seems like the following constructs I added break Stryker in some way...

        Action greet = delegate { Console.WriteLine("Hello!"); };
        greet();

        Action<int, double> introduce = delegate { Console.WriteLine("This is world!"); };
        introduce(42, 2.7);

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

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