using System;
using System.IO;
namespace FileSearcher {
    class Program {
        static void Main( string[] args ) {
            if(args.Length != 2) {
                Console.WriteLine("Error: usage is FileSearcher Directory String");
                return;
            }
            string[] filesToSearch = Directory.GetFiles(@args[0], "*.cs", SearchOption.AllDirectories);
            string line;
            foreach (string filePath in filesToSearch) {
                using (StreamReader file = new StreamReader(filePath)) {
                    int lineCount = 1;
                    while((line = file.ReadLine()) != null) {
                        if (line.Contains(args[1])) Console.WriteLine(filePath + " @Line " + lineCount);
                        lineCount++;
                    }
                }
            }
        }
    }
}