[Fact]
        public void TaskEnvironment_MultithreadedEnvironment_ShouldBeIsolatedFromSystem()
        {
            string testVarName = $"MSBUILD_MULTITHREADED_ISOLATION_TEST_{Guid.NewGuid():N}";
            string testVarValue = "multithreaded_test_value";

            using var driver = new MultiThreadedTaskEnvironmentDriver(
                GetResolvedTempPath(),
                new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase));
            var multithreadedEnvironment = new TaskEnvironment(driver);

            try
            {
                // Verify system and environement doesn't have the test variable initially
                Environment.GetEnvironmentVariable(testVarName).ShouldBeNull();
                multithreadedEnvironment.GetEnvironmentVariable(testVarName).ShouldBeNull();

                // Set variable in multithreaded environment
                multithreadedEnvironment.SetEnvironmentVariable(testVarName, testVarValue);

                // Multithreaded should have the value but system should not
                multithreadedEnvironment.GetEnvironmentVariable(testVarName).ShouldBe(testVarValue);
                Environment.GetEnvironmentVariable(testVarName).ShouldBeNull();
            }
            finally
            {
                Environment.SetEnvironmentVariable(testVarName, null);
            }
        }