Write to a file from multiple threads asynchronously c#

Question

Here is my situation. I would like to make writing to the file system as efficient as possible in my application. The app is multi-threaded and each thread can possibly wr

Answer 1

Have a look at Asynchronous I/O. This will free up the cpu to continue with other tasks.
Combine with ReaderWriterLock as @Jack B Nimble mentioned

If by

writing to the file system as efficient as possible

you mean making the actual file I/O as fast as possible you are going to have a hard time speeding it up much, disk is just physically slower. Maybe SSD's?