Add "Usage" of each key.
Optimize the code.
ready for IndividualReadWriteLocks
Simplify the IndividualLocks, and removed dependency of AsyncLock, and use SemaphoreSlim instead. Notice: use "using" (instead of "lock") for all locking statements
Update ConcurrentDictionaryLazy to 1.2.0
Support Serializable Attribute.
Improve the logic of cleanup.
Use new library
Improve the logic of cleanup.
Start point.
Add "Usage" of each key.
Optimize the code.
Start point.