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

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

In C#, both Lock and Semaphore are used for synchronization, but they serve different purposes. A Lock is used to ensure that only one thread can access a resource at a time, while a Semaphore can allow 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 only a certain number of connections at once.

What are the performance implications of using Lock vs Semaphore?

Locks are generally faster for single-thread access, but Semaphores can introduce overhead due to their ability to manage multiple threads. The choice depends on your specific use case.

Are there any scenarios where using both is beneficial?

Yes, you might use a Lock to protect a critical section of code while using a Semaphore to limit access to a shared resource, combining their strengths for better control.