如何在撰写本文时压缩 xml 文件

我正在编写大小超过 1GB 的 XML 文件，但在撰写本文时，我想压缩该文件，以便减小 xml 文件的大小，以便在xmlDoc.Load(fileName)的磁贴处在最短的持续时间内加载文件。我编写 XML 文件的代码是

 using (FileStream fileStream = new FileStream(_logFilePath, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite))
                {
                    xmlDoc.Load(fileStream);
                    int byteLenght = fileStream.ReadByte();
                    byte[] intBytes = BitConverter.GetBytes(byteLenght);
                    intBytes = Compress(intBytes);
                    xmlDoc.DocumentElement.AppendChild(newelement);
                    fileStream.SetLength(0);
                    xmlDoc.Save(fileStream);
                }

也用于压缩

private static byte[] Compress(byte[] data)
        {
            byte[] retVal;
            using (MemoryStream compressedMemoryStream = new MemoryStream())
            {
                DeflateStream compressStream = new DeflateStream(compressedMemoryStream, CompressionMode.Compress, true);
                compressStream.Write(data, 0, data.Length);
                compressStream.Close();
                retVal = new byte[compressedMemoryStream.Length];
                compressedMemoryStream.Position = 0L;
                compressedMemoryStream.Read(retVal, 0, retVal.Length);
                compressedMemoryStream.Close();
                compressStream.Close();
            }
            return retVal;
        }

但它不适用于压缩文件。