System.Threading.Tests.ExecutionContextTests.CaptureThenSuppressThenRunFlowTest C# (CSharp) Method

        public static void CaptureThenSuppressThenRunFlowTest()
        {
            ThreadTestHelpers.RunTestInBackgroundThread(() =>
            {
                var asyncLocal = new AsyncLocal<int>();
                asyncLocal.Value = 1;

                ExecutionContext executionContext = ExecutionContext.Capture();
                ExecutionContext.SuppressFlow();
                ExecutionContext.Run(
                    executionContext,
                    state =>
                    {
                        Assert.Equal(1, asyncLocal.Value);
                        VerifyExecutionContextFlow(asyncLocal, 1);
                    },
                    null);
                Assert.Equal(1, asyncLocal.Value);
                VerifyExecutionContextFlow(asyncLocal, 0);
                ExecutionContext.RestoreFlow();
                VerifyExecutionContextFlow(asyncLocal, 1);

                executionContext = ExecutionContext.Capture();
                asyncLocal.Value = 2;
                ExecutionContext.SuppressFlow();
                Assert.True(ExecutionContext.IsFlowSuppressed());
                ExecutionContext.Run(
                    executionContext,
                    state =>
                    {
                        Assert.Equal(1, asyncLocal.Value);
                        VerifyExecutionContextFlow(asyncLocal, 1);
                    },
                    null);
                Assert.Equal(2, asyncLocal.Value);
                VerifyExecutionContextFlow(asyncLocal, 0);
                ExecutionContext.RestoreFlow();
                VerifyExecutionContextFlow(asyncLocal, 2);
            });
        }