Class2.F1 C# (CSharp) Method

    public int F1(string Msg) {
        Console.WriteLine("Class2.F1: {0}", Msg);
        return 2;
    }

    public static void Main()
    {
        Class1 obj1 = new Class1();

        CheckReturnedInt(obj1.F1("obj1"), 1);
        CheckReturnedString(obj1.F2("obj1"), "String returned from Class1.F2:obj1");
        CheckReturnedString(obj1.NonVirtualFunc(11), "String returned from Class1.NonVirtualFunc:11");
        Console.WriteLine("");

        Class2 obj2 = new Class2();

        CheckReturnedInt(obj2.F1("obj2"), 2);
        CheckReturnedString(obj2.F2("obj2"), "String returned from Class2.F2:obj2");
        CheckReturnedString(obj2.NonVirtualFunc(15), "String returned from Class2.NonVirtualFunc:30");
        Console.WriteLine("");

        I1 itf;

        itf = obj1;
        CheckReturnedInt(itf.F1("itf is now obj1"), 1);
        CheckReturnedString(itf.F2("itf is now obj1"), "String returned from Class1.F2:itf is now obj1");
        Console.WriteLine("");

        itf = obj2;
        CheckReturnedInt(itf.F1("itf is now obj2"), 2);
        CheckReturnedString(itf.F2("itf is now obj2"), "String returned from Class2.F2:itf is now obj2");
        Console.WriteLine("");

        if (failed)
        {
            System.Environment.ExitCode = 1;
        }
        else
        {
            System.Environment.ExitCode = 0;
        }
    }