private void SaveStringToFile( string afilename, string txt ) {
try {
if (File.Exists(afilename)) {
using (StreamWriter sr = File.AppendText(afilename) ) {
sr.WriteLine(txt);
}
} else {
using (StreamWriter sw = File.CreateText(afilename)) {
sw.WriteLine(txt);
}
}
} catch (Exception e) {
throw( new Exception('Cannot save: ' + afilename + '\nError is:\n' + e.Message));
}
}