System.Configuration.Internal.InternalConfigRoot.AcquireHierarchyLockForRead C# (CSharp) Метод

        private void AcquireHierarchyLockForRead() {
            // Protect against unexpected recursive entry on this thread.
            // We do this in retail, too, because the results would be very bad if this were to fail,
            // and the testing for this is not easy for all scenarios.
            Debug.Assert(!_hierarchyLock.IsReaderLockHeld, "!_hierarchyLock.IsReaderLockHeld");
            if (_hierarchyLock.IsReaderLockHeld) {
                throw ExceptionUtil.UnexpectedError("System.Configuration.Internal.InternalConfigRoot::AcquireHierarchyLockForRead - reader lock already held by this thread");
            }

            Debug.Assert(!_hierarchyLock.IsWriterLockHeld, "!_hierarchyLock.IsWriterLockHeld");
            if (_hierarchyLock.IsWriterLockHeld) {
                throw ExceptionUtil.UnexpectedError("System.Configuration.Internal.InternalConfigRoot::AcquireHierarchyLockForRead - writer lock already held by this thread");
            }

            _hierarchyLock.AcquireReaderLock(-1);
        }