public void Add(Printer.Abstract.Printer printer)
{
if (ReferenceEquals(Set, null))
{
Set = new HashSet <Printer.Abstract.Printer>();
}
if (ReferenceEquals(printer, null))
{
throw new ArgumentNullException(nameof(printer));
}
Set.Add(printer);
}
public bool Remove(Printer.Abstract.Printer printer)
{
if (ReferenceEquals(Set, null))
{
return(true);
}
if (ReferenceEquals(printer, null))
{
return(true);
}
if (Set.Contains(printer))
{
Set.Remove(printer);
return(true);
}
return(false);
}