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C# Classes

In C#, When defining a class you are defining a blueprint for a data type. Defining a class does not mean you defined the data, but it does define what the class name means by adding attributes.

When an object of a class is created and populating data to attributes at this point you defined an object of type your new class.. The methods and variables that constitute a class are called members of the class.

Defining a Class Syntax

<access specifier> class  class_name {
   // member variables
   <access specifier> <data type> variable1;
   <access specifier> <data type> variable2;
   ...
   <access specifier> <data type> variableN;
   // member methods
   <access specifier> <return type> method1(parameter_list) {
      // method body
   }
   <access specifier> <return type> method2(parameter_list) {
      // method body
   }
   ...
   <access specifier> <return type> methodN(parameter_list) {
      // method body
   }
}


C# Class example

In below we will create a class called Car the class has: color attribue, getter and setter for the color, and Describe() that print to output.
We will create objects of that class in main() method and we will set the Color:

using System;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Car car;

            car = new Car("Red");
            Console.WriteLine(car.Describe());

            car = new Car("Green");
            Console.WriteLine(car.Describe());

        }
    }

    class Car
    {
        private string color;

        public Car(string color)
        {
            this.color = color;
        }

        public string Describe()
        {
            return "This car is " + Color;
        }

        public string Color
        {
            get { return color; }
            set { color = value; }
        }
    }
}

Output

This car is Red
This car is Green

Conclusion

In this page (written and validated by ) you learned about C# Classes



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