Refactoring exercise taken from the Kata Word Wrap

wordwrap.cs

using System;
using System.Collections.Generic;

class WordWrap {
    static string[] Erzeuge_Zeilen(string[] worte, int maxLineLength) {
		List<string> lines = new List<string>();

		var i = 0;
		var line = "";
		while(true) {
			if	(i == worte.Length) {
				if	(line.Length != 0) {
					lines.Add(line);
				}						
				break;
			}

			String nextWord = worte[i];

			if (string.IsNullOrWhiteSpace(line) && nextWord.Length > maxLineLength) {
				String head = nextWord.Substring(0, maxLineLength);
				String body = nextWord.Substring(maxLineLength);
				lines.Add(head);
				worte[i] = body;
			}
			else {						
				int futureLength = line.Length + nextWord.Length + (line.Length > 0 ? 1 : 0);
				if (futureLength <= maxLineLength) {
					line += (line.Length > 0 ? " " : "") + nextWord;
					i++;
				}
				else {
					lines.Add(line);
					line = "";
				}
			}
		}				

		return lines.ToArray ();		
	}
}

wordwraptests.cs

using NUnit.Framework;
using System;
using System.Collections.Generic;

[TestFixture ()]
public class WordWrapTests
{
	[Test]
	public void testErzeugeZeilen() {
		var worte = new[]{ "1", "22", "333", "55555"};
		var lineLength = 5;
		var result = WordWrap.Erzeuge_Zeilen(worte, lineLength);
		Assert.AreEqual(new String[]{"1 22", "333", "55555"}, result);
	}

	[Test]
	public void testErzeugeZeilenMitZuLangemWort() {
		var worte = new[]{ "1", "22", "666666", "55555"};
		var lineLength = 5;
		var result = WordWrap.Erzeuge_Zeilen(worte, lineLength);
		Assert.AreEqual(new String[]{"1 22", "66666", "6", "55555"}, result);
	}
}