remove white space and blank line from lines of comma text file

System.IO.File.WriteAllText(@"c:\path.txt", line);

Incidentally, using WriteAllText isn't a good choice in this case. It will overwrite the

file for each line so only the last line will be in the file. Something like this might

be better:

using (StreamWriter fs = new StreamWriter("path.txt"))
{
foreach (string line in File.ReadAllLines("TESTDATA.txt"))
    {
    string line1;
    line1 = line.Replace("\t", "");
    line1 = line1.Replace("\r", "");
    line1 = line1.Trim();
    line1 = line1.Replace(" ", "");
    if(line1.Length > 0) fs.WriteLine(line1);
    }
}

- Wayne