Hands-On Parallel Programming with C# 8 and .NET Core 3

Using the Parallel.For method

Parallel.For is a variant of the sequential for loop, with the difference that the iterations run in parallel. Parallel.For returns an instance of the ParallelLoopResult class, which provides the loop competition status once the loop has finished execution. We can also check the IsCompleted and LowestBreakIteration properties of ParallelLoopResult to find out if the method has completed or canceled, or if break has been called by the users. Here are the possible scenarios:

IsCompleted	LowestBreakIteration	Reason
True	N/A	Run to completion
False	Null	Loop stopped pre-matching
False	Non-null integral value	Break called on the loop

The basic syntax of the Parallel.For method ...