C#

        private void SearchButton_Click(object sender, EventArgs e)
        {
            string FilePath = "C:\\Users\\Jase\\Documents\\dumpFile.txt";

            StreamReader ReadFile = new StreamReader(FilePath);
            string ReadAll = ReadFile.ReadToEnd();
            ReadFile.Close();

            string regMatch = "ht|f" + "tp://" <word> ".com" | ".net" | ".org";

            if (Regex.IsMatch(ReadAll, regMatch))
            {
                StatusLabel.Text = (regMatch + " was found.");
            }
            else
            {
                StatusLabel.Text = (regMatch + " was not found.");
            }
        }