CSV tool/solution Needed

public void DoFilter(Int32 skipRows, string fileName)
{
    const RegexOptions options = ((RegexOptions.IgnorePatternWhitespace | RegexOptions.Multiline) | RegexOptions.IgnoreCase);
    Regex regex = new Regex(",(?=(?:[^\"]*\"[^\"]*\")*(?![^\"]*\"))", options);


    string tmpFileName = Path.GetTempFileName();
    using (var sw = new StreamWriter(tmpFileName))
    {
        using (var filestream = File.OpenText(fileName))
        {
            for (int i = 0; i < skipRows; i++)
            {
                filestream.ReadLine();
                if (filestream.EndOfStream)
                {
                    break;
                }
            }
            while (!filestream.EndOfStream)
            {
                string line = filestream.ReadLine();
                var oo = regex.Split(line);

                //process your data here
                //if(row doen't match exlusion criteria
                {
                    // write to a new file
                    sw.WriteLine(line);
                }
            }
        }
    }
    //move the new file to the old file when we are finished.
    File.Move(tmpFileName, fileName);
}