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

static IEnumerable Split(string str, int chunkSize)
{
   IEnumerable retVal = Enumerable.Range(0, str.Length / chunkSize)
        .Select(i => str.Substring(i * chunkSize, chunkSize))

   if (str.Length % chunkSize > 0)
        retVal = retVal.Append(str.Substring(str.Length / chunkSize * chunkSize, str.Length % chunkSize));

   return retVal;
}

It correctly handles input string length not divisible by chunkSize.

Please note that additional code might be required to gracefully handle edge cases (null or empty input string, chunkSize == 0).