private void loadPortsName()
{
cboPorts.Items.Clear();
string[] arrComPortNames = null;
int index = -1;
string stComPortName = null;
//Com Ports
arrComPortNames = RFIDReader.GetPortsName();
if (arrComPortNames.Length > 0)
{
do
{
index += 1;
cboPorts.Items.Add(arrComPortNames[index]);
}while (!((arrComPortNames[index] == stComPortName) || (index == arrComPortNames.GetUpperBound(0))));
Array.Sort(arrComPortNames);
if (index == arrComPortNames.GetUpperBound(0))
{
stComPortName = arrComPortNames[0];
}
//get first item print in text
cboPorts.Text = arrComPortNames[0];
}
}