以线程安全的方式更新具有增量编号的文件

I have a service that I'm writing in c# that accept request from multiple sources at a a given time. Each request is assigned an ID (simple int) that is incremented for every request. Currently that incremented counter variable is a global variable (which is fine), and I increment it in the following way (which for my understanding and testing is thread safe):I have a service that I'm writing in c# that ac