TransactionalNodeService.TransactionalMappingToolService.DecompressBulkOperations C# (CSharp) Method

        private BulkOperations DecompressBulkOperations(string compressedOperations)
        {
            MemoryStream compressedOperationsStream = null;
            MemoryStream decompressedOperationsStream = null;
            ZlibStream decompressionStream = null;

            try
            {
                byte[] compressedOperationsBytes = Convert.FromBase64String(compressedOperations);
                compressedOperationsStream = new MemoryStream(compressedOperationsBytes);
                byte[] buffer = new byte[1024];
                int numBytesRead = 0;
                bool start = true;

                decompressedOperationsStream = new MemoryStream();

                using (decompressionStream = new ZlibStream(compressedOperationsStream, CompressionMode.Decompress))
                {
                    while (start || numBytesRead > 0)
                    {
                        numBytesRead = decompressionStream.Read(buffer, 0, buffer.Length);

                        if (numBytesRead > 0)
                        {
                            decompressedOperationsStream.Write(buffer, 0, numBytesRead);
                        }

                        start = false;
                    }
                }

                decompressedOperationsStream.Position = 0;

                DataContractSerializer deserializer = new DataContractSerializer(typeof(BulkOperations));

                BulkOperations operations = deserializer.ReadObject(decompressedOperationsStream) as BulkOperations;

                return operations;
            }
            finally
            {
                if (decompressedOperationsStream != null)
                {
                    decompressedOperationsStream.Dispose();
                    decompressedOperationsStream = null;
                }
            }
        }