Interfaces in C# for complete Beginners

A QUICK INTRODUCTION :

An interface in C# is analogous to a set of instructions for a computer program. An interface tells a C# program what methods and properties it needs to have in order to function properly, much like a recipe tells you what ingredients to use and how to cook them to make a delicious meal.

So, if you want to create a program that does something specific, such as a game or a calculator, you can use an interface to ensure that your programme contains all of the required components.

Assume you’re creating a game in which you move characters around on a screen. You could use an interface to ensure that your game includes a method for moving the characters, a property for tracking their positions, and other important features.

And, just as you would follow a recipe step by step to ensure that your food is delicious, a C# program will follow the instructions in an interface to ensure that it works properly.

Consider an interface in C# to be a set of instructions/layout/blueprint that tells a program what to do and how to do it. It’s like a computer program’s recipe!

A SMALL EXAMPLE :

Assume you want to make a program that can draw shapes on the screen. You could define what properties and methods a shape requires in order to be drawn using an interface called IDrawable. Here’s an illustration:

We’ve defined two properties (X and Y) that will represent the shape’s location on the screen, as well as a method (Draw()) that will be used to draw the shape.

Assume we want to make a Square class that implements the IDrawable interface. Our class would be structured as follows:

The IDrawable interface has been implemented here by defining the X, Y, and Draw() properties and methods defined in the interface.

To draw a square, we can now create a new Square object and call its Draw() method:

The console will then display the message “Drawing a square at (10, 20)”.

As a result, in this example, the Square class implemented the attributes and methods specified by the IDrawable interface to ensure that the form could be drawn properly. No matter what shape they are, we can guarantee that all of our shapes have the required characteristics and drawing methods by using an interface.

A FEW ADVANTAGES :

1. It allows the program to work with a variety of objects. Programs can work with various types of things, such as different shapes or animals, in the same way that you might use a different spoon or measuring cup for different recipes. An interface tells the program what each thing needs to function properly.
2. It makes changing parts of the program easier without breaking everything. You may want to change something in a recipe, such as using a different type of flour. If you do this, you may need to adjust other aspects of the recipe, such as the amount of water used. Similarly, if you want to change a part of a program, an interface can assist you in doing so without breaking other parts of the program.
3. It saves people time when creating new program. People can use the same interface for different program, just as they might use the same recipe for different meals. This saves time because they don’t have to rewrite everything every time they create a new program.
4. It ensures that everything works together as it should. An interface tells a program what methods and properties it needs to have in order to function properly, much like a recipe tells you what ingredients to use and how to cook them to make a delicious meal. This ensures that everything functions as it should.

Interfaces in C# are thus analogous to computer program recipes. They make it easier for programs to work with different things, make it easier to change parts of the program without breaking everything, save time when creating new program, and ensure everything works properly.