Multiple instances of StreamWriter working on multiple different disk files in multiple different tasks. Could I run into threading problems?

Question

I have a C# application that creates multiple tasks (class System.Threading.Tasks.Task). Each of these tasks writes to a file, each one writes to a different file from the others, using a different StreamWriter instance.

Microsoft's docs says that: "By default, a StreamWriter is not thread safe."

This means that I could run into problems also in the case described above?

If each of the thread function writes to a different file using their own copy of the StreamWriter, then yo do not have a problem. — Anand Sowmithiran
– Anand Sowmithiran, Commented Apr 30, 2022 at 9:30

Kux · Accepted Answer · 2022-04-30 09:46:43Z

2

"StreamWriter is not thread safe." only means that it is not safe to use multiple threads on the SAME StreamWriter instance.

answered Apr 30, 2022 at 9:46

Kux

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Anand Sowmithiran · Accepted Answer · 2022-04-30 09:42:31Z

Since you are saying each task is writing to a different file with its own dedicated instance of StreamWriter, you do not have a problem. You need not do synchronization in your scenario. Only if a single streamwriter instance is used by multiple thread functions then there is a need to do lock based synchronization.

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