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I have two for loops. which the second loop must be started after finishing the first loop.
So, If I use two Parallel.For() loops, will the second loop runs after the finishing the first loop?
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You don't have to do anything special, Parallel. Foreach() will wait until all its branched tasks are complete. From the calling thread you can treat it as a single synchronous statement and for instance wrap it inside a try/catch.
For already blocks your current thread till all tasks are done. Parallel. For doesn't return until its done. If you wrap it in a Task , then that task will complete at "exactly" the same point in time at which the Parallel.
In a parallel loop, the restrictions on the ordering of the loop iterations are relaxed, which allows the iterations to execute – at least partially – in parallel. In the example, all iterations can execute in parallel, since they are completely independent of each other.
With TPL we can implement Parallel Programming in C# . NET very easy. Async and Await keywords were introduced in C# 5.0 by Microsoft. When you use the “Async” keyword, you can write code the same way you wrote synchronous code.
Yes. Parallel.For will not return until all operations have completed.
If you run
Parallel.For(0, 5, i => Console.WriteLine("First {0}", i)); Console.WriteLine("First Finished"); Parallel.For(0, 5, i => Console.WriteLine("Second {0}", i)); Console.WriteLine("Second Finished"); The output is
First 0 First 2 First 1 First 4 First 3 First Finished Second 0 Second 4 Second 3 Second 2 Second 1 Second Finished The order of the integers will vary, but second will always come after first.
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