ConcurrentObjectPool`1 Provides concurrent object pool where object selection is thread-safe but not selected object.

 AtomicBoolean Represents atomic boolean.

 AtomicReference`1 Provides container with atomic operations for the reference type.

 Lock Represents unified representation monitor lock, read lock, write lock or upgradable read lock.

 Timeout Helps to compute timeout for asynchronous operations.

 AsyncDelegate Provides set of methods for asynchronous invocation of various delegates.

 AtomicDouble Various atomic operations for data type accessible as extension methods.

 AtomicFloat Various atomic operations for data type accessible as extension methods.

 AtomicInteger Various atomic operations for data type accessible as extension methods.

 AtomicLong Various atomic operations for data type accessible as extension methods.

 AtomicReference Provides atomic operations for the reference type.

 LockAcquisition Provides a set of methods to acquire different types of lock.