What is the difference between Semaphore and Mutex in C#?

What is the difference between Semaphore and Mutex in C#?

In C#, both Semaphore and Mutex are synchronization primitives, but they serve different purposes. A Mutex is used for exclusive access to a resource, allowing only one thread to access it at a time. In contrast, a Semaphore allows a specified number of threads to access a resource concurrently.

Can you give me an example of when to use a Semaphore?

Sure! Use a Semaphore when you want to limit the number of threads accessing a resource, like a database connection pool, where you might want to allow a maximum of 5 concurrent connections.

What about Mutex? When should I use it?

You should use a Mutex when you need to ensure that only one thread can access a critical section of code or a resource at a time, such as writing to a log file.

Are there any performance differences between them?

Yes, Mutex can be slower than Semaphore due to its heavier locking mechanism. If you need to allow multiple threads, Semaphore is generally more efficient.