CODE --> c#

private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
        {
            BackgroundWorker worker = sender as BackgroundWorker;            
        }

        private void FindInFiles(string directoryArg, string containsTextArg, bool ignoreCaseArg, params string[] fileWildcardsArg)
        {   
            // This List accumulates files found.
            List<String> files = new List<string>(); 

            foreach (string fileWildcard in fileWildcardsArg)
            {
                string[] xFiles = System.IO.Directory.GetFiles(directoryArg, fileWildcard);

                foreach (string x in xFiles)
                {
                    // If file not already found...
                    if (!files.Contains(x)) 
                    {
                        bool containsText =
                            containsTextArg.Length == 0 ||
                            ignoreCaseArg ?
                            System.IO.File.ReadAllText(x).ToLower().Contains(containsTextArg.ToLower()) :
                            System.IO.File.ReadAllText(x).Contains(containsTextArg);

                        if (containsText)
                        {
                            // This file is a keeper. Add it to the list. and set is as a varialbe                                                        
                            _FilePath = x;
                        }
                    }
                }
            }
                        
            LoadFile();
        }

        private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {

        }