Best way to split string into lines

How do you split multi-line string into lines?

I know this way

var result = input.Split("\n\r".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);

looks a bit ugly and loses empty lines. Is there a better solution?

If you want to keep empty lines just remove the StringSplitOptions.

var result = input.Split(System.Environment.NewLine.ToCharArray());

Slightly twisted, but an iterator block to do it:

public static IEnumerable<string> Lines(this string Text)
{
int cIndex = 0;
int nIndex;
while ((nIndex = Text.IndexOf(Environment.NewLine, cIndex + 1)) != -1)
{
int sIndex = (cIndex == 0 ? 0 : cIndex + 1);
yield return Text.Substring(sIndex, nIndex - sIndex);
cIndex = nIndex;
}
yield return Text.Substring(cIndex + 1);
}

You can then call:

var result = input.Lines().ToArray();

private string[] GetLines(string text)
{

List<string> lines = new List<string>();
using (MemoryStream ms = new MemoryStream())
{
StreamWriter sw = new StreamWriter(ms);
sw.Write(text);
sw.Flush();

ms.Position = 0;

string line;

using (StreamReader sr = new StreamReader(ms))
{
while ((line = sr.ReadLine()) != null)
{
lines.Add(line);
}
}
sw.Close();
}



return lines.ToArray();
}

using (StringReader sr = new StringReader(text)) {
string line;
while ((line = sr.ReadLine()) != null) {
// do something
}
}

You could use Regex.Split:

string[] tokens = Regex.Split(input, @"\r?\n|\r");

Edit: added `|\r` to account for (older) Mac line terminators.