public class SampleMailboxFilter : IMailboxFilter, IMailboxFilterFactory
{
public Task<MailboxFilterResult> CanAcceptFromAsync(ISessionContext context, IMailbox @from, int size = 0, CancellationToken token)
{
causes an Error CS1737: Optional parameters must appear after all required parameters - I believe size should not have =0 after it.
causes an Error CS1737: Optional parameters must appear after all required parameters - I believe size should not have
=0
after it.