.NET Framework Strings Split string into fixed length blocks
Example
We cannot break a string into arbitrary points (because a System.Char may not be valid alone because it's a combining character or part of a surrogate) then code must take that into account (note that with length I mean the number of graphemes not the number of code-units):
public static IEnumerable<string> Split(this string value, int desiredLength)
{
var characters = StringInfo.GetTextElementEnumerator(value);
while (characters.MoveNext())
yield return String.Concat(Take(characters, desiredLength));
}
private static IEnumerable<string> Take(TextElementEnumerator enumerator, int count)
{
for (int i = 0; i < count; ++i)
{
yield return (string)enumerator.Current;
if (!enumerator.MoveNext())
yield break;
}
}
