>>>Hi,
>>>Given:

>>>private int scaleFactor = 1;
>>>public int ScaleFactor
>>>        {
>>>            get { return scaleFactor; }
>>>            set
>>>            {
>>>                if (value == 0)
>>>                {
>>>                    scaleFactor = scaleFactor == 1 ? -1 : 1;
>>>                }
>>>                else
>>>                    scaleFactor = value;
>>>            }
>>>        }

Why isn't i = -1 after

int i = --ScaleFactor;

>>
>>Where is i ?
>
>Sorry. Not sure what you mean. If you mean where is the 'int i = --ScaleFactor' line then it's in a button click but I don't see the relevance
>Regards,
>Viv


I misunderstood i = -1 to be an assignment rather than i == -1 a comparaison

It's a weird construct with side effects - it's skipping zero


You decrement the ScaleFactor, a zero is in i, the zero gets assigned back to ScaleFactor, but the Set has a side effect and assigns it -1 instead of zero

The decrement operator does not 're-fetch' the value of ScaleFactor after assignment

If other values (2, 3, ...) are allowed, I would suggest this code, since you never know, without testing, when it was zero

--ScaleFactor;
int i = ScaleFactor;

Update: If you put a breakpoint on

int i = --ScaleFactor;

and step through it, you'll see how it works