Rewrite only a specific portion of a file in c#

Question

I want to update the content of my csv, but I want to do it an other way than delete the whole content and write it again. Is there a way to rewrite a specific line in the csv file? I am doing something like this at the moment:

System.IO.File.WriteAllText("File.csv", string.Empty);
using (StreamWriter sw = File.AppendText("File.csv"))
{
  var writer = new CsvWriter(sw);             
   for (int i = 0; i < Values.Count; i++)
   {
      writer.WriteField(Values[i]);
      writer.NextRecord();
   }
}

Answer 1

I use CsvHelper. Something like :

 var csvFactory = new CsvFactory();
 using(var parser = csvFactory.CreateParser(reader, DefaultCsvConfiguration)){

    while(true){
       var arrayResult = parser.Read();

       if(arrayResult == null){
          break; //end of file
       }

       else{
          //DO THINGS WITH arrayResult
       }
    }
}