public unsafe void BuildCommDcb()
{
DeviceControlBlock dcb = Communications.BuildDeviceControlBlock(@"baud=1200 parity=N data=8 stop=1");
dcb.BaudRate.Should().Be(CommBaudRate.Baud_1200);
dcb.Parity.Should().Be(Parity.None);
dcb.ByteSize.Should().Be(8);
dcb.StopBits.Should().Be(StopBits.One);
}