A traditional multithreading scenario is one where multithreading can be of benefit even on a single-core machine—with no true parallelization taking place. We covered these in the previous chapter: they include such tasks as maintaining a responsive user interface and downloading two web pages at once.

Some of the constructs that we’ll cover in this chapter are also sometimes useful in traditional multithreading. In particular:

• PLINQ and the Parallel class are useful whenever you want to execute operations in parallel and then wait for them to complete (structured parallelism).This includes non-CPU-intensive tasks such as calling a web service.

• The task parallelism constructs are useful when you want to run some operation on a pooled thread (we introduced this in the previous chapter), and also to manage a task’s workflow through continuations and parent/child

tasks.

• The concurrent collections are sometimes appropriate when you want a thread-safe queue, stack, or dictionary.

• BlockingCollection provides an easy means to implement producer/consumer structures.

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