what is interface in c

In C#, an interface is a code structure that defines a contract between an object and its user. It is a type definition similar to a class, except that it purely represents a contract between an object and its user. An interface can contain declarations of methods, properties, indexers, and events, but it cannot contain instance fields. Any class or struct that implements the interface must provide an implementation of the members defined in the interface. To access the interface methods, the interface must be "implemented" by another class. Implementing an interface is simply done by using the symbol, just like with inheritance. The body of the interface method is provided by the "implement" class. Interfaces are a powerful tool for achieving abstraction and allowing objects to interact with each other. They define a set of methods, properties, and events that a class must implement, but do not provide an implementation for them. Interfaces act as a contract between different components of a system, allowing developers to break down their code into modular components and easily maintain and update them.