c# - Skipping header when reading CSV -

i want able skip header when reading , writing csv

here code have far

  try         {             using (streamwriter sw = new streamwriter(writefilename))// streamwriter used write text file             using (streamreader sr = new streamreader(readfilename)) // streamreader used read text file             {                 //writing headings file                 heading = "ni number,surname,forename,employee,employer(gross),contribution status,contribution status date";                 sw.writeline(heading);                   while ((txtline = sr.readline()) != null)  // reads 1 line variable txtline                 {                        //spiliting file columns if there in it.                     //oldcolumns = txtline.split(',');                      oldcolumns = regex.split(txtline, ",");                      //spliting old columns[0] there space , putting in names array.                     //names = regex.split(oldcolumns[0],",");                   string []  names = oldcolumns[0].split(' ');                   var result = string.join(" ", oldcolumns[0].split(' ').skip(1));                         //writing oldcolumns data newcolumns.                     newcolumns[0] = oldcolumns[1];                     newcolumns[1] = result;                     newcolumns[2] = names[0];                     newcolumns[3] = oldcolumns[9];                     newcolumns[4] = oldcolumns[11];                     newcolumns[5] = "";                     newcolumns[6] = "";                       //using loop run through columns                     csvline = "";                       (int = 0; < 7; i++)                     {                         csvline = csvline + "\"" + newcolumns[i].replace("\"", "") + "\",";                     }                      //writing file.                     sw.writeline(csvline);                 } 

i understand if wanted skip column in loop dont know how skip row.

if want discard first line of file, call readline() , discard result before further processing:

// discard header row sr.readline()  // further processing while ((txtline = sr.readline()) != null) { } 

please note 1 line not mean 1 row in csv. use library read csv.