private void button1_Click(object sender, EventArgs e) { using (MyClient client = new MyClient()) { client.Server = "localhost"; client.Port = 2110; client.TimeOut = 1000; client.UserName = "******"; client.Open(); client.Login(); string[] lines = client.GetLines(); textBox1.Text += StringUtils.GetStringsAsString(lines); lines = new string[] { "<root>", "<somedata>data</somedata>", "</root>" }; client.SendLines(lines); client.Close(); textBox1.Text += "Done\r\n\r\n"; } }