txtAddress.Text = "Street|Locality|City|State|PostalCode|Country";

string[] sAddressDetails = txtAddress.Text.Split('|');


System.IO.File.WriteAllText("C://PipedText.TXT", txtAddress.Text);

string _sA = "A", _sB = "B", _sC = "C";

System.IO.File.WriteAllText("C://ConcatenatedText.TXT", _sA + "|" + _sB + "|" + _sC);