System.Threading.Tests.AsyncLocalTests.NotifyOnValuePropertyChange C# (CSharp) Method

        public static async Task NotifyOnValuePropertyChange()
        {
            bool expectThreadContextChange = false;
            int expectedPreviousValue = 0;
            int expectedCurrentValue = 1;
            bool gotNotification = false;
            bool expectNotification = false;

            AsyncLocal<int> local = new AsyncLocal<int>(
                args =>
                {
                    gotNotification = true;

                    Assert.True(expectNotification);
                    expectNotification = false;

                    Assert.Equal(args.ThreadContextChanged, expectThreadContextChange);
                    Assert.Equal(args.PreviousValue, expectedPreviousValue);
                    Assert.Equal(args.CurrentValue, expectedCurrentValue);
                });

            expectNotification = true;
            local.Value = 1;

            Assert.True(gotNotification);

            expectNotification = true;
            expectThreadContextChange = true;
            expectedPreviousValue = local.Value;
            expectedCurrentValue = 0;
            return;
        }