Splitting a string into chunks of a certain size

Question

Suppose I had a string:

string str = \"1111222233334444\"; 

How can I break this string into chunks of some size?

e.g., breaking t

Answer 1

Simple and short:

// this means match a space or not a space (anything) up to 4 characters
var lines = Regex.Matches(str, @"[\s\S]{0,4}").Cast().Select(x => x.Value);