System.Tests.ActivatorTestsExtended.TestingBindingFlags C# (CSharp) Method

        static void TestingBindingFlags()
        {
            Assert.Throws<MissingMethodException>(() => Activator.CreateInstance(typeof(ClassWithPrivateCtor), BindingFlags.Public | BindingFlags.Instance, null, null, CultureInfo.CurrentCulture));
            Assert.Throws<MissingMethodException>(() => Activator.CreateInstance(typeof(ClassWithPrivateCtor), BindingFlags.Public | BindingFlags.Instance, null, new object[] { 1, 2, 3 }, CultureInfo.CurrentCulture));


            Flag.Reset(0); Assert.Equal(0, Flag.cnt);
            Activator.CreateInstance(typeof(ClassWithPrivateCtor), BindingFlags.Static | BindingFlags.NonPublic, null, null, CultureInfo.CurrentCulture);
            Assert.Equal(300, Flag.cnt);
            Activator.CreateInstance(typeof(ClassWithPrivateCtor), BindingFlags.Instance | BindingFlags.NonPublic, null, null, CultureInfo.CurrentCulture);
            Assert.Equal(500, Flag.cnt);

            Flag.Reset(0); Assert.Equal(0, Flag.cnt);
            Activator.CreateInstance(typeof(ClassWithPrivateCtor2), BindingFlags.Instance | BindingFlags.NonPublic, null, null, CultureInfo.CurrentCulture);
            Assert.Equal(300, Flag.cnt);
            Activator.CreateInstance(typeof(ClassWithPrivateCtor2), BindingFlags.Static | BindingFlags.NonPublic, null, null, CultureInfo.CurrentCulture);
            Assert.Equal(500, Flag.cnt);

            Flag.Reset(0); Assert.Equal(0, Flag.cnt);
            Activator.CreateInstance(typeof(ClassWithPrivateCtor3), BindingFlags.Instance | BindingFlags.Public, null, new object[] { 122 }, CultureInfo.CurrentCulture);
            Assert.Equal(400, Flag.cnt);
            Activator.CreateInstance(typeof(ClassWithPrivateCtor3), BindingFlags.Static | BindingFlags.NonPublic, null, null, CultureInfo.CurrentCulture);
            Assert.Equal(600, Flag.cnt);
            Activator.CreateInstance(typeof(ClassWithPrivateCtor3), BindingFlags.Instance | BindingFlags.Public, null, new object[] { 122 }, CultureInfo.CurrentCulture);
            Assert.Equal(900, Flag.cnt);

            Assert.Throws<MissingMethodException>(() => Activator.CreateInstance(typeof(ClassWithPrivateCtor), BindingFlags.Public | BindingFlags.Static, null, null, CultureInfo.CurrentCulture));
            Assert.Throws<MissingMethodException>(() => Activator.CreateInstance(typeof(ClassWithPrivateCtor), BindingFlags.Public | BindingFlags.Static, null, new object[] { 122 }, CultureInfo.CurrentCulture));
        }