In C#, how do you mix a default get with an explicit set?

Question

I want to do something like this:

class Foo
{
    bool Property
    {
        get;
        set
        {
            notifySomethingOfTheChange();
            // What should I put here to set the value?
        }
    }
}

Is there anything I can put there to set the value? Or will I have to explicitly define the get and add another field to the class?

This would be ambiguous to the compiler. Would the set happen before or after `notifySomethingOfTheChange()`? — Corey Ogburn, Jul 10 '12 at 13:14

score 16 · Accepted Answer · answered Jul 10 '12 at 13:13

You either have a default property, with compiler-generated backing field and getter and/or setter body, or a custom property.

Once you define your own setter, there is no compiler-generated backing field. You have to make one yourself, and define the getter body also.

score 14 · Answer 2 · answered Jul 10 '12 at 13:13

14

There is no way.

You can either have both setter and getter auto-implemented
```
bool Property { get; set; }
```

Or implement both manually

bool Property
{
    get { return _prop; }
    set { _prop = value; }
}

answered Jul 10 '12 at 13:13

abatishchev

98,240
88
296
433

score 6 · Answer 3 · answered Jul 10 '12 at 13:13

6

No this is the case where auto-properties are not the best fit, and therefore the point at which you go to proper implemented properties:

class Foo
{
    private bool property;
    public bool Property
    {
        get
        {
            return this.property;
        }
        set
        {
            notifySomethingOfTheChange();
            this.property = value
        }
    }
}

answered Jul 10 '12 at 13:13

Jamiec

133,658
13
134
193

@Cloud it's quite "planely" obvious you're right ;) The accepted answer is basically the same answer, just without code. – Jamiec Feb 11 '19 at 10:24
1

I feel like that is going to go wright over everyone's heads. – Cloud Feb 11 '19 at 10:34

score -3 · Answer 4 · answered Jul 25 '18 at 20:41

-3

In many cases you can use the "Auto Property" feature e.g. public int Age { get; set; } = 43;

This is a good reference http://www.informit.com/articles/article.aspx?p=2416187

Naji K.

answered Jul 25 '18 at 20:41

Naji El Kotob

1

3

This does not answer the question. OP is in a situation where they cannot use an auto property, and has already stated so. – BJ Myers Jul 25 '18 at 20:52

In C#, how do you mix a default get with an explicit set?

4 Answers4