An asynchronous .NET Standard 2.0 library that allows you to lock based on a key (keyed semaphores), limiting concurrent threads sharing the same key to a specified number, with optional pooling for reducing memory allocations.

C#多线程编程实战

A class that uses SemaphoreSlim but allows a negative initialCount. This could be used, for example, when starting to throttle requests but initially already have more concurrent requests than the maximum you want to start allowing.

All questions in your team about how to properly use locks can be answered with "use Locky" from now on. It is very easy to use, because you can lock on strings via both synchronous and asynchronous methods. There is no risk of forgetting to assign something to a static field, because Locky is static itself (or use Lockally which is also included).

Demo for synchronization primitives used in sync or async code

A NuGet library for c# locking by a given key

Running tasks synchronously, using a Semaphore without blocking,