Downgrading ReaderWriterLockSlim UpgradeableReadLock to simple ReadLock

Question

The documentation of ReaderWriterLockSlim.EnterUpgradeableReadLock says:

A thread in upgradeable mode can downgrade to read mode or upgrade to write mode.

How do I downgrade the lock to a read lock? The documentation does't tell...

[Edit:] I'm not trying to get the write lock. I just want to downgrade the upgradeable lock to a read lock so that another thread can acquire the upgradeable lock.

Answer 1

It's automatic - the lock will upgrade to writeable when necessary. You don't have to do anything. It's a read lock unless you request writing.

Answer 2

According to the MSDN documentation for ReaderWriterLockSlim (the class itself):

"A thread in upgradeable mode can downgrade to read mode by first calling the EnterReadLock method and then calling the ExitUpgradeableReadLock method."