Difference between Encoding.Default.GetBytes and Using MemoryStream

[salshHIT]

\[code\] XDocument xDocumentObject = XDocument.Parse("<Test>"+ "<elementx id="1" att="aaa" />" + "<elementx id="2" att="bbb" />" + "</Test>");\[/code\]What is the difference between :-\[code\] 1) byte[] xmlBytes = Encoding.Default.GetBytes(xDocumentObject.ToString());\[/code\]AND \[code\] 2) byte[] xmlBytes; using (MemoryStream ms = new MemoryStream()) { xDocumentObject.Save(ms); xmlBytes = ms.ToArray(); }\[/code\]What is "Default" encoding in 1) and what is the encoding used in 2)?