C# interface constructor

An interface is defined using the interface keyword similar to the class. An Interface is a blueprint that outlines a group of methods, properties, events, or indexers that a class or struct must implement.

Unlike classes it contains only the declaration of the members. The implementation of the interface’s members will be given by a class that implements the interface implicitly or explicitly. There are some important points to remember as mentioned below:

• Interfaces can not have private members.
• By default, all the members of Interface are public and abstract.
• The interface will always defined with the help of the keywordinterface
• Interface cannot contain fields because they represent an implementation of data.
• We can achieve multiple inheritance with the interface but not with the classes.
• We can implement multiple interfaces in a single class separated by commas.

Example1: Demonstrating the basic case for implementing Interface

Example 2: Implementation of interfaces and the use of polymorp