System.Threading/LockRecursionException.cs
System.Threading/LockRecursionPolicy.cs
System.Threading/ReaderWriterLockSlim.cs
+../corlib/System.Threading/AtomicBoolean.cs
+System.Threading/ThreadLockState.cs
+System.Threading/ReaderWriterLockSlimExtensions.cs
Microsoft.Win32.SafeHandles/SafePipeHandle.cs
System.IO.Pipes/AnonymousPipeClientStream.cs
System.IO.Pipes/AnonymousPipeServerStream.cs