Split addressrow into name; number; letter

public object DoWork() { if (InValues.Length < 1) throw new Exception("1 input parameter expected!"); // get the first input parameter string s = (string)InValues[0].GetString(); string output = String.Empty; int posFirstNumber = -1; int posLastNumber = -1; int lastPos = s.Length - 1; // check whether a number is a part of the address and get the first and last index for (int i = s.Length - 1; i >= 0; i--) { // check whether the character is nummeric? if (IsNumeric(s[i])) { if (posLastNumber == -1) posLastNumber = i; } else if (posLastNumber != -1 && posFirstNumber == -1) posFirstNumber = lastPos; lastPos = i; } if (posFirstNumber != -1) { // create output for the Split Heater output = s.Substring(0, posFirstNumber - 1); output += "#"; output += s.Substring(posFirstNumber, posLastNumber - posFirstNumber + 1); output += "#"; if (posLastNumber < s.Length) output += s.Substring(posLastNumber + 1); } else { // no number in address found output = s + "##"; } return output; } public bool IsNumeric(char c) { int output; return Int32.TryParse(c.ToString(), out output); }