BasePrinter Dispose() method block printing

[emanuhell]

BasePrinter Dispose() method block printing. For example:

printer.Write(e.Initialize());
printer.Write(e.Enable());
printer.Write(Tests.Receipt(e));
printer.Dispose();

prints nothing! I need the Dispose method to release the connection to the printer after each print, to allow other running applications to use the same printer. Thanks.

[lukevp]

Which printer are you using? Some of the implementations are asynchronous (Writes are buffered and flushed by a task). This is to increase the performance of many small writes. You may just be disposing the connection before the flush happens. We should probably expose a way to await the print queue being empty.

[emanuhell]

Which printer are you using? I'm using the SerialPrinter.

We should probably expose a way to await the print queue being empty. What method are you talking about? I can't find it.

Thanks.

[mtarlac]

Sorry for digging this up but what is the difference between version 1.6 (which works fine) and 3.0?

After it prints the first time, I'm facing an error

System.IO.IOException: Device or resource busy : '/dev/usb/lp3'

I tried both options

var printerLinUsb = new FilePrinter(filePath: '/dev/usb/lp3'`, false);
...
printerLinUsb.Dispose();

and

using (var printerLinUsb = new FilePrinter(filePath: '/dev/usb/lp3'`, false))
{
...
}