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copied!<p>If you are doing much lookup and speed is more important than memory you might want to process the file once and put the information into a dictionary. That way lookup is very fast and you only have to read the file once.</p> <p>Here's some code that will parse data like the example you gave:</p> <pre><code>class Program { static void Main(string[] args) { string filename = "example.txt"; Dictionary<string, int[][]> myDictionary = new Dictionary<string, int[][]>(); BuildMyDataDictionary(filename, myDictionary); //lookup via key int x = 20; int y = 180; string key = string.Format("{0}.{1}", x, y); int[][] values = myDictionary[key]; //print the values to check foreach (int[] array in values) foreach (int i in array) Console.Write(i + ", "); Console.WriteLine(); Console.ReadKey(); } private static void BuildMyDataDictionary(string filename, Dictionary<string, int[][]> myDictionary) { using (StreamReader r = new StreamReader(filename)) { string line = r.ReadLine(); // read through the file line by line and build the dictionary while (line != null) { Regex regx = new Regex(@"//\s*H\-(\d*)\w(\d*)"); Match m = regx.Match(line); if (m.Success) { // make a key of the two parts int 1 and int2 separated by a "." string key = string.Format("{0}.{1}", m.Groups[1], m.Groups[2]); // continue reading the block List<int[]> intList = new List<int[]>(); line = r.ReadLine(); while (!Regex.IsMatch(line, @"^\s*\}")) { Regex regex = new Regex("[{},]"); intList.Add(regex.Replace(line, " ").Trim().Split(new char[] { ' ' }).Select(int.Parse).ToArray()); line = r.ReadLine(); } myDictionary.Add(key, intList.ToArray()); } line = r.ReadLine(); } } } } </code></pre> <p>The example file I tested with was:</p> <pre><code>{ // H-20e180a.wav {-7,5,-4,-1,-9,2,-5,-1,2,-12,12,-33,34,-48,41,-40,16,20,730,4751,3861}, {-7,5,-4,-1,-9,2,-5,-1,2,-12,12,-33,34,-48,41,-40,16,20,} } { // H-21e181a.wav {-7,5,-4,-1,-9,2,-5,-1,2,-12,12,-33,34,-48,41,-40,16,20,730,4751,3861}, {-7,5,-4,-1,-9,2,-5,-1,2,-12,12,-33,34,-48,41,-40,16,20,} {-7,5,-4,-1,-9,2,-5,-1,2,-12,12,-33,34,-48,41,-40,16,20,730,4751,3861}, } </code></pre> <p>I borrowed the int[] parsing and creation from jltrem above.</p>

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