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This article mainly introduces the relevant knowledge of "how to define C# interface". The editor shows you the operation process through an actual case, and the operation method is simple, fast and practical. I hope this article "how to define C# interface" can help you solve the problem.

Interface defines the syntax contract that all classes should follow when inheriting interfaces. The interface defines the "what is" part of the grammar contract, and the derived class defines the "how to do" part of the grammar contract.

The interface defines properties, methods, and events, which are members of the interface. The interface contains only the declaration of the member. The definition of a member is the responsibility of a derived class. Interface provides a standard structure that derived classes should follow.

The interface makes the class or structure that implements the interface consistent in form.

Abstract classes are similar to interfaces to some extent, but they are mostly used when only a few methods are declared by the base class to be implemented by derived classes.

The interface itself does not implement any function, it just enters into a contract with the object that declares to implement the interface what behavior must be implemented.

Abstract classes cannot be instantiated directly, but allow concrete, functional classes to be derived.

Define the interface: MyInterface.cs

The interface is declared using the interface keyword, which is similar to the declaration of a class. The interface declaration defaults to public. Here is an example of an interface declaration:

Interface IMyInterface

{

Void MethodToImplement ()

}

The above code defines the interface IMyInterface. Usually the interface command starts with the letter I, and this interface has only one method, MethodToImplement (), and there are no parameters and return values. Of course, we can set the parameters and return values as needed.

It is worth noting that there is no concrete implementation of this method.

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