Regular expression to split string and number

Question

I have a string of the form:

codename123

Is there a regular expression that can be used with Regex.Split() to split the alphabetic part and

Answer 1

Another simpler way is

string originalstring = "codename123";
string alphabets = string.empty;
string numbers = string.empty;

foreach (char item in mainstring)
{
   if (Char.IsLetter(item))
   alphabets += item;
   if (Char.IsNumber(item))
   numbers += item;
}

Answer 2

A little verbose, but

Regex.Split( "codename123", @"(?<=[a-zA-Z])(?=\d)" );

Can you be more specific about your requirements? Maybe a few other input examples.