Here is the method which will help you..
/// <summary>
/// This function will be used to Compress XML DATA
/// using Gzip Stream
/// </summary>
/// <param name=”xDocument”>XMLDocument to compress</param>
/// <returns>byte array</returns>
private byte[] ConvertXDocumentToGzip(XDocument xDocument)
{
//buffer to write Compressed data
byte[] buffer;
//Compress the XML DATA
MemoryStream memoryStream = new MemoryStream();
XmlWriter xmlWriter = XmlWriter.Create(memoryStream);
//Save data to memoryStream
xDocument.Save(xmlWriter);
//writer Close
xmlWriter.Close();
//Reset Memorystream postion to 0
memoryStream.Position = 0;
//create buffer of total content Length
buffer = new byte[memoryStream.Length];
//Create a stream to compress the data
GZipStream gzipStream = new GZipStream(memoryStream, CompressionMode.Compress);
//compress the data
gzipStream.Write(buffer, 0, buffer.Length);
//Close the underlying streams
gzipStream.Flush();
gzipStream.Close();
memoryStream.Flush();
memoryStream.Close();
//return compressed data as byte array
return buffer;
}
