Industry attributes might be connected for the compiler produced backing area in automobile-implemented properties. One example is, think about a revision to the Person class that adds a singular integer Id residence. You create the Id house applying an auto-implemented home, but your structure isn't going to demand persisting the Id home.
A get assets accessor is utilized to return the assets value, and a established home accessor is utilized to assign a brand new worth.
Developers that use this class need not know the main points of the implementation. None of those inside changes have an affect on using the individual item. That is the essential cause of utilizing Properties to expose information members of the object.
syntax to outline methods that comprise a single expression. Here, that expression returns the entire name for the individual item.
Now, the FirstName residence may be accessed from any code, but it surely can only be assigned from other code in the Person course.
It will toss a NullReferenceException with out this sign in that scenario. For more information, see occasions. This instance also takes advantage of the new nameof operator to transform in the residence title image to its textual content illustration. Using nameof can lower faults where you've properties mistyped the identify with the property.
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Properties behave like fields if they're accessed. Even so, as opposed to fields, properties are applied with accessors that outline the statements executed each time a residence is accessed or assigned.
It is also lawful to position the more restrictive modifier about the get accessor. One example is, you could have a public home, but limit the get accessor to personal. That scenario is rarely done in apply.
You can also limit modifications into a assets in order that it may possibly only be set inside a constructor. You could modify the Person class so as follows:
Property accessors normally encompass solitary-line statements that just assign or return the result of an expression.
The NonSerializedAttribute can only be connected to fields, not properties. You can attach the NonSerializedAttribute into the backing discipline with the Id residence through the use of the sphere: specifier about the attribute, as demonstrated in the following case in point:
Properties are a kind of wise fields in a class or object. From outdoors the item, they appear like fields in the object.
A ultimate state of affairs in which you might want to compose code inside of a assets accessor is to assist the INotifyPropertyChanged interface used to inform knowledge binding consumers that a value has transformed. When the worth of the property changes, the object raises the INotifyPropertyChanged.
PropertyChanged occasion to indicate the improve. The data binding libraries, consequently, update Screen aspects depending on that improve. The code beneath demonstrates how you would probably apply INotifyPropertyChanged for your FirstName residence of this particular person class.