When is ReaderWriterLockSlim better than a simple lock?

Question

I\'m doing a very silly benchmark on the ReaderWriterLock with this code, where reading happens 4x more often than writting:

class Program
{
    static void          


        

Answer 1

There's no contention in this program. The Get and Add methods execute in a few nanoseconds. The odds that multiple threads hit those methods at the exact time are vanishingly small.

Put a Thread.Sleep(1) call in them and remove the sleep from the threads to see the difference.