private void RegisterButton_Click(object sender, EventArgs e)
{
if (!(TextBoxIP.Text == null || TextBoxPort.Text == null) && (TextBoxIP.Text != this.ip || TextBoxPort.Text != this.port))
{
_client.Disconnect();
_client.ConnectAsync(IPAddress.Parse(TextBoxIP.Text), Convert.ToInt32(TextBoxPort.Text));
this.ip = TextBoxIP.Text;
this.port = TextBoxPort.Text;
}
_client.SendRegister(TextBoxUsername.Text, TextBoxPassword.Text);
}