Lucene.Net.Search.TestCachingWrapperFilter.RefreshReader C# (CSharp) Method

        private static DirectoryReader RefreshReader(DirectoryReader reader)
        {
            DirectoryReader oldReader = reader;
            reader = DirectoryReader.OpenIfChanged(reader);
            if (reader != null)
            {
                oldReader.Dispose();
                return reader;
            }
            else
            {
                return oldReader;
            }
        }
    }