C#

try
{
    string path = fsw.Path;
    string outPath = "C:\\TestDir2\\";
    char[] trimchars = new char[] { '.', 't', 'x', 't' };
    DirectoryInfo dinfo = new DirectoryInfo(path);
    foreach (FileInfo finfo in dinfo.GetFiles("*.*"))
    {
        File.Copy(finfo.FullName, outPath + finfo.FullName, true);
    }
}

StreamReader sr = new StreamReader(strMainPath);
            string allRead = sr.ReadToEnd();
            sr.Close();
            regMatch = textBox1.Text;
            if (Regex.IsMatch(allRead, regMatch))
            {
                richTextBox1.Find(regMatch);
                richTextBox1.SelectionColor = Color.Red;
                richTextBox1.SelectionBackColor = Color.Yellow;
                
            }