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copied!<p>To expand on other people's suggestions:</p> <ol> <li>The hardest part of this is probably the code that transforms a number to an english string representing that number - Sani's programming assignment. I've included a simplified example that may not meet your requirements.</li> </ol> <pre>private static string[] digitnames = new string[] { "oh", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"}; private static string ReplaceDigits(string s) { string convertedSoFar = ""; //could use a StringBuilder if performance is an issue. for (int charPos = 0; charPos < s.Length; charPos++) { if (char.IsNumber(s[charPos])) { //Add the digit name matching the digit. convertedSoFar += digitnames[int.Parse(s[charPos].ToString())]; } else { //we've reached the end of the numbers at the front of the string. //Add back the rest of s and quit. convertedSoFar += s.Substring(charPos); break; } } return convertedSoFar; }</pre> <p>This code turns "101 dalmations" into "oneohone dalmations" and "12 angry men" into "onetwo angry men". A more complete solution could be built, perhaps from <a href="https://stackoverflow.com/questions/3213/c-convert-integers-into-written-numbers">Wedge's solution to a slightly different problem</a>. I haven't tested that code, and it isn't designed to handle the string after the digits, but it's probably a good start.</p> <ol start="2"> <li>In modern C# (3.0 and higher, I think) you can pass a method name to Sort, rather than explicitly creating an IComparable or IComparer. This is essentially the same idea as Michael's link. Another related option is an anonymous <a href="http://msdn.microsoft.com/en-us/library/bb397687.aspx" rel="nofollow noreferrer">lambda expression</a> which wouldn't even require an external method. Personally I think the code reads more cleanly this way.</li> </ol> <pre>private static int NumberReplacingCompare(string strA, string strB) { return ReplaceDigits(strA).CompareTo(ReplaceDigits(strB)); } private static void OutputSortedStrings() { List strings = new List(File.ReadAllLines(@"D:\Working\MyStrings.txt")); //pull the strings from a file (or wherever they come from strings.Sort(NumberReplacingCompare); //sort, using NumberReplacingCompare as the comparison function foreach (string s in strings) { System.Console.WriteLine(s); } }</pre>

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