Properties are fields with logics.
The following code get and set CurrentRadius from Circle.
Circle myCircle = new Circle();
myCircle.CurrentRadius = 30;
myCircle.CurrentRadius -= 3;
Console.WriteLine (myCircle.CurrentRadius);
CurrentRadius is like a field when you are using them.
A property is declared like a field, but with a get/set block added.
Here's how to implement CurrentRadius as a property:
class Circle { decimal currentRadius; // The private "backing" field public decimal CurrentRadius // The public property { get { return currentRadius; } set { currentRadius = value; } } }
get and set are property accessors.
get accessor runs when the property is read.
It must return a value of the property's type.
set accessor runs when the property is assigned.
It has an implicit parameter named value of the property's type that you typically assign to a private field(currentRadius).
Properties give the implementer complete control over getting and setting its value.
Properties allow the following modifiers:
| Modifier | Value |
|---|---|
| Static modifier | static |
| Access modifiers | public internal private protected |
| Inheritance modifiers | new virtual abstract override sealed |
| Unmanaged code modifiers | unsafe extern |