Debugging and diagnosing lock convoying problems in .NET

Question

I am looking into performance issues of a large C#/.NET 3.5 system that exhibits performance degradation as the number of users making requests scales up to 40-50 distinct user

Answer 1

I can't provide much insight into the diagnostics, but if you find proof to back up your assumption then you might be interested in System.Threading.ReaderWriterLockSlim which allows for concurrent reads, but prevents concurrent writes.