serialPort.Open()老出现异常，如何消除？

[lafengyym]

private void serialPortCOM_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
{
labRec.Text = serialPortCOM.ReadExisting();
}

private void btnOpen_Click(object sender, EventArgs e)
{
serialPortCOM.PortName = "COM2";
if (!serialPortCOM.IsOpen)

serialPortCOM.Open();

} 调试的时候就出现IOException 数据无效，请问如何消除这个异常！

[只在此山中]

try
{
//你的代码
}
catch
{
}