c# - Adding XML nodes into an existing XML config file -

i have xml file contains node (in middle of xml file):

<stationssection>     <stations /> </stationssection> 

i need append becomes this:

<stationssection>     <stations>         <add comment="i'm here!" destinationfolderpath="c:\" ftphostname="ftp://upload.domain.com/" ftpfolderpath="myfolder/" ftpusername="555" ftppassword="secret!!!" ftptimeoutinseconds="20" />         <add comment="i'm here!" destinationfolderpath="c:\" ftphostname="ftp://upload.domain.com/" ftpfolderpath="myfolder/" ftpusername="555" ftppassword="secret!!!" ftptimeoutinseconds="20" />     </stations> </stationssection> 

that data ("comment", "destinationfolderpath", etc.) stored in generic list of custom object - called "updatedstations". when try add them this:

foreach (var station in updatedstations) {     xelement updatedstation = new xelement("add", elementtoadd); // "elementtoadd" has value     xml.add(updatedstation); // "xml" xdocument } 

...that "updatedstation" variable has value:

<add>comment="i'm here!" destinationfolderpath="c:\" ftphostname="myfolder/" ftpfolderpath="ftp://upload.domain.com/" ftpusername="555" ftppassword="secret!!!" ftptimeoutinseconds="20"</add> 

when tries line:

xml.add(updatedstation); 

i exception:

this operation create incorrectly structured document.

how can work?... thank you!

don't use string operations( updatedstation ). below example linq2xml + xpath (assuming can parts of updatedstation)

var xdoc = xdocument.load(filename); var st = xdoc.xpathselectelement("//stationssection/stations"); st.add(new xelement(             "add",              new xattribute("comment","i'm here"),             new xattribute("destinationfolderpath","c:\\")  )        ); 

ps: don't forget include namespaces

using system.xml.xpath; using system.xml.linq;