Implements a threadsafe Begin/End style counter with callback on first begin/last end

Designed to create a disposable context for a ReaderWriterLock so that a lock can be attained in a using statement

Class used to check for a distinct mutex

Used by the Loader to set the synchronization object for invoking events on the main thread.

Used to perform asynchronous operations using a worker thread whose work is queued for execution in a first-in, first-out fashion, one at a time.

Encapsulates an operation to be performed.

Delegate for event to handle when a queued work item is completed

Safely raises events or invokes delegates on the correct threads for attached/targets that implement ISynchronizeInvoke such as a Control