Split csv line with commas and quotes in data

csvsplit.cs

    public static List<string> single_line_process2(string line)
    {
      List<string> lineparts = new List<string>();

      List<char> this_section = new List<char>();
      bool quoteson = false;

      //Action<int> act = (int a) =>{ a = 6; };
      Func<int, bool> islineend = (int i) => { return i >= line.Length - 1 ? true : false; };
      Action<char> addtosection = (c) => { this_section.Add(c); };
      Action newsection = () => {
        lineparts.Add(new string(this_section.ToArray()));
        this_section = new List<char>();

      };

      for (int i = 0; i < line.Length; i++)
      {
        var c = line[i];
        if (c == '\"')
        {

          if (quoteson)
          {
            if (!islineend(i) && line[i +1]=='\"')
            {
              addtosection('\"');
              i++;
              continue;

            }
            else
            {
              newsection();
              i++; //we are at double quotes and they are ending, next will be comma and shud be skipped.
              quoteson = false;

            }
          }
          else
          {
            quoteson = true;
            continue;

          }
        }
        else if (c == ',')
        {
          if (quoteson)
          {
            addtosection(c);
            continue;

          }
          else
          {
            newsection();

          }

        }
        else
        {
          addtosection(c);
          if (islineend(i))
            newsection();

        }

      }
      return lineparts;

    }