Wed, February 7, 2007, 04:16 PM under dotNET | Orcas
System.Threading is yet another namespace in System.Core.dll. There is only one main class in there: ReaderWriterLockSlim (don’t worry, System.Threading.ReaderWriterLock is still there in the mscorlib dll). The other types in the namespace are there just in a support role, including the LockRecursionPolicy enumeration and the LockRecursionException class. Joe has the details on ReaderWriteLockSlim here.