string startFolder = @"D:\Program Files (x86)\Microsoft Visual Studio 12.0\";

            IEnumerable<FileInfo> fileList = GetFiles(startFolder);

            Regex searchTerm = new Regex(@"Visual (Basic|C#|Studio)");

            var queryMatchingFiles = from file in fileList

                                     where file.Extension == ".htm"

                                     let fileText = File.ReadAllText(file.FullName)

                                     let matches = searchTerm.Matches(fileText)

                                     where matches.Count >

                                     select new

                                     {

                                         name = file.FullName,

                                         mat = from Match match in matches

                                               select match.Value

                                     };

            foreach (var item in queryMatchingFiles)

            {

                Console.WriteLine(item.name);

                foreach (var item1 in item.mat)

                {

                    Console.WriteLine(item1);

                }

            }

            Console.WriteLine();

            Console.WriteLine("Press Any Key to Exit...");

            Console.ReadKey();