When printing in OO2.1 using .NET and C# if function for printing is called from
another thread while first thread hasn't finished printing OO hangs.

Workaround is to use locking so that only one thread can access the print job,
but this is only localized at application level. I guess OO can still hang if he
gets a job from another application.

Code example:
public bool PrintDocument()
{
    lock (sync)
    {
        try
        {
            XPrintable xPrint = (XPrintable)xTextDocument;
            PropertyValue[] pv = new PropertyValue[1];
            pv[0] = new PropertyValue();
            pv[0].Name = "Wait";
            pv[0].Value = new uno.Any(true);
            xPrint.print(pv);
        }
        catch
        {
            return false;
        }
    }
    return true;
}