ThreadPool, QueueUserWorkItem, AutoResetEvent, ManualResetEvent, EventWaitHandle

The managed thread pool

https://learn.microsoft.com/ru-ru/dotnet/standard/threading/the-managed-thread-pool

https://learn.microsoft.com/en-us/dotnet/standard/threading/the-managed-thread-pool

ThreadPool.QueueUserWorkItem

https://learn.microsoft.com/ru-ru/dotnet/api/system.threading.threadpool.queueuserworkitem?view=net-7.0

ManualResetEvent Класс

https://learn.microsoft.com/ru-ru/dotnet/api/system.threading.manualresetevent?view=net-7.0

AutoResetEvent

https://learn.microsoft.com/ru-ru/dotnet/api/system.threading.autoresetevent?view=net-7.0

EventWaitHandle

https://learn.microsoft.com/ru-ru/dotnet/api/system.threading.eventwaithandle?view=net-7.0