Is it possible to create object for interface in .net

An interface contains definitions for a group of related functionalities that a non-abstract class or a struct must implement. An interface may define static methods, which must have an implementation. Beginning with C 8. An interface may not declare instance data such as fields, auto-implemented properties, or property-like events.

By using interfaces, you can, for example, include behavior from multiple sources in a class. That capability is important in C because the language doesn't support multiple inheritance of classes. In addition, you must use an interface if you want to simulate inheritance for structs, because they can't actually inherit from another struct or class.

You define an interface by using the interface keyword as the following example shows. The name of an interface must be a valid C identifier name.

By convention, interface names begin with a capital I. A class or struct can implement multiple interfaces, but a class can only inherit from a single class. Interfaces can contain instance methods, properties, events, indexers, or any combination of those four member types. Interfaces may contain static constructors, fields, constants, or operators. An interface can't contain instance fields, instance constructors, or finalizers.

Interface members are public by default, and you can explicitly specify accessibility modifiers, such as public , protected , internal , private , protected internal , or private protected. However, as of PHP 8. For that reason, it is strongly recommended that developers use the same parameter names as the interface being implemented.

Note : Interfaces can be extended like classes using the extends operator. Note : The class implementing the interface must declare all methods in the interface with a compatible signature. It's possible for interfaces to have constants.

An interface, together with type declarations, provides a good way to make sure that a particular object contains particular methods. See instanceof operator and type declarations. Traits ». Submit a Pull Request Report a Bug. Note: To implement multiple interfaces, separate them with a comma see example below.

We just launched W3Schools videos. Get certified by completing a course today! If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail:. Note: Interfaces can contain properties and methods, but not fields. WriteLine "Some text..

ReadFile ; file1. WriteFile "content" ; file2. ReadFile ; file2. Try it. Do not use public modifier with an explicit implementation. It will give a compile-time error. Example: Explicit Implementation. Example: Implement Multiple Interfaces. OpenBinaryFile ; file2. Points to Remember :. Interface can contain declarations of method, properties, indexers, and events.

Interface cannot include private, protected, or internal members. Interface cannot contain fields, and auto-implemented properties. A class or a struct can implement one or more interfaces implicitly or explicitly.