如何：创建限制并发程度的任务计划程序。
How to: Create a Task Scheduler That Limits the Degree of Concurrency.
假设修改相同文件的并发程度并不很高(多少依赖一点运气)，那么后续的重试应该会成功，没有冲突。
Assuming that the degree of concurrency to modify the same files is not very high (as well as relying on a bit of luck), a subsequent retry should succeed without conflicts.
就像面向任务并行库的代码一样，PLINQ查询会根据主计算机的能力按比例调整并发程度。
Just like code that targets the Task Parallel Library, PLINQ queries scale in the degree of concurrency based on the capabilities of the host computer.
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