winforms - How to save sort stage of datagridview inform c# -

i want parse xml string. java code:

public document loadxmlfromstring(string xml) throws exception     {         documentbuilderfactory factory = documentbuilderfactory.newinstance();         documentbuilder builder = factory.newdocumentbuilder();         inputsource = new inputsource(new stringreader(xml));         return  builder.parse(is);     } 

but when parsing , met exception:

[fatal error] nitf-3-3.dtd:1:3: markup declarations contained or pointed document type declaration must well-formed. 

i can't figure out why exception occurred. think may involve "nitf". can me?

this xml string:

<?xml version=" 
 
BLOGGER TEST 
    
i have data grid view column have sorted =automation.  question: when click on header , data in dgv sorted (asc or des). after that, submit data , reload dgv --> don't save before stage. how save sort stage(which column sorted?). in advance
     
 
 
  
try this, may you
  
datagridviewcolumn oldcolumn = datagridview1.sortedcolumn; listsortdirection direction = listsortdirection.ascending; datagridview1.sort(newcolumn, direction); //give column in place of newcolumn sorting newcolumn.headercell.sortglyphdirection = direction == listsortdirection.ascending ? sortorder.ascending : sortorder.descending;