private void button3_Click(object sender, EventArgs e)
{
UserPassDateSetCLS dataset = new UserPassDateSetCLS();
StreamReader keyReader = new StreamReader(keyFileName);
string keyXmlStr = keyReader.ReadToEnd();
string EncyptKeyStr = EDncpytString(keyXmlStr, true);
FileStream fs = new FileStream(keyFileName + "E", FileMode.Create);
StreamWriter sw = new StreamWriter(fs);
sw.Write("test");
sw.Flush();
sw.Close();
fs.Close();
//dataset.ReadXml(keyReader);
}