private void GetCommStateNative(ref SerialPortFixer.Dcb lpDcb)
{
int num = 0;
SerialPortFixer.Comstat comstat = new SerialPortFixer.Comstat();
int num1 = 0;
while (num1 < 10)
{
if (!SerialPortFixer.ClearCommError(this.m_Handle, ref num, ref comstat))
{
SerialPortFixer.WinIoError();
}
if (!SerialPortFixer.GetCommState(this.m_Handle, ref lpDcb))
{
if (num1 == 9)
{
SerialPortFixer.WinIoError();
}
num1++;
}
else
{
return;
}
}
}
private SerialPortFixer(string portName)
{
if (portName == null || !portName.StartsWith("COM", StringComparison.OrdinalIgnoreCase))
{
throw new ArgumentException("Invalid Serial Port", "portName");
}
else
{
SafeFileHandle safeFileHandle = SerialPortFixer.CreateFile(string.Concat("\\\\.\\", portName), -1073741824, 0, IntPtr.Zero, 3, 1073741824, IntPtr.Zero);
if (safeFileHandle.IsInvalid)
{
SerialPortFixer.WinIoError();
}
try
{
int fileType = SerialPortFixer.GetFileType(safeFileHandle);
if (fileType == 2 || fileType == 0)
{
this.m_Handle = safeFileHandle;
this.InitializeDcb();
}
else
{
throw new ArgumentException("Invalid Serial Port", "portName");
}
}
catch
{
safeFileHandle.Close();
this.m_Handle = null;
throw;
}
return;
}
}