Default Implementation
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What is Default Implementation?
Default Implementation is a feature introduced in C# 8.0 that allows interface methods to have an implementation. This means that interfaces can now define not only the signature of a method, but also its implementation. This is a significant change from previous versions of C#, where interfaces could only define the signature of a method, and the implementation had to be provided by the class that implemented the interface.
Why Use Default Implementation?
There are several reasons why you might want to use default implementation in your C# code. One reason is to provide a default implementation for a method that is common to all classes that implement the interface. This can save you from having to write the same code in multiple classes, and it can help to ensure that all classes that implement the interface behave in the same way.
Another reason to use default implementation is to provide a fallback implementation for a method that is not implemented by a class that implements the interface. This can be useful if you want to ensure that all classes that implement the interface have a consistent behavior, even if they do not implement the method themselves.
How to Use Default Implementation
To use default implementation in your C# code, you simply need to define a method in an interface and provide an implementation for it. The implementation can be as simple or as complex as you need it to be. Here is an example of a simple default implementation:
public interface IMyInterface
{
void MyMethod();
}
public class MyClass : IMyInterface
{
public void MyMethod()
{
Console.WriteLine("Hello, world!");
}
}
In this example, the IMyInterface interface defines a method called MyMethod. The MyClass class implements the IMyInterface interface and provides a default implementation for the MyMethod method. This means that all classes that implement the IMyInterface interface will have a MyMethod method that behaves in the same way.
