Parallel LINQ (PLINQ)

Most LINQ queries run on a single thread, taking each element through the pipeline one after another. PLINQ is the parallel version: it splits the data across multiple threads, runs your Where and Select on those threads at the same time, and merges the results back. This lesson covers when PLINQ helps, when it hurts, and the operators that turn parallel queries on, tune them, and switch them back off.