public void DowngradeLockAllowsReadLock()
{
var myLock = new AsyncReaderWriterLockSlim();
myLock.EnterWriteLock();
Assert.IsFalse(myLock.TryEnterWriteLock(0));
Assert.IsFalse(myLock.TryEnterReadLock(0));
// After downgrading the lock and after the try to get the write lock is canceled,
// it should be possible to enter another read lock.
myLock.DowngradeWriteLockToReadLock();
Assert.IsFalse(myLock.TryEnterWriteLock(0));
Assert.IsTrue(myLock.TryEnterReadLock(0));
myLock.ExitReadLock();
myLock.ExitReadLock();
}
