System.Threading.Tests.ReaderWriterLockTests.NotOwnerTest C# (CSharp) Method

        public static void NotOwnerTest()
        {
            var trwl = new TestReaderWriterLock();
            trwl.ReleaseReaderLock(NotOwnerExceptionHResult);
            trwl.ReleaseWriterLock(NotOwnerExceptionHResult);
            trwl.DowngradeFromWriterLock(new TestLockCookie(), NotOwnerExceptionHResult);

            {
                trwl.AcquireReaderLock();

                trwl.ReleaseWriterLock(NotOwnerExceptionHResult);

                TestLockCookie tlc = trwl.UpgradeToWriterLock();
                TestLockCookie tlc2 = tlc.Clone();
                trwl.DowngradeFromWriterLock(tlc); // tlc is invalid, tlc2 is valid
                trwl.DowngradeFromWriterLock(tlc2, NotOwnerExceptionHResult);

                trwl.ReleaseReaderLock();
            }

            trwl.Dispose();
        }