Operators like “*=” cause incorrect behavior

``` C#
            if (y.Any())
                x = 1;
            else
                x *= 2;
```

Such expression is refactored to:

``` C#
            x = (y.Any()) ? 1 : 2;
```

but should be:

``` C#
            x = (y.Any()) ? 1 : x * 2;
```
