ACCESS MODIFIERS IN C# .NET

     ACCESS MODIFIERS

Access modifiers are an integral part of object-oriented programming. They support the concept of encapsulation, which promotes the idea of hiding functionality. Access modifiers allow you to define who does or doesn't have access to certain features.

In C# there are 3 different types of Access Modifiers.

Modifier	Description
public	There are no restrictions on accessing public members.
Private	Access is limited to within the class definition. This is the default access modifier type if none is formally specified
protected	Access is limited to within the class definition and any class that inherits from the class
INTERNAL
PROTECTEDINTERNAL

1. PUBLIC

 

The public keyword is an access modifier for types and type members. Public access is the most permissive access level.

 

There are no restrictions on accessing public members.

 

Accessibility: 

• Can be accessed by objects of the class
• Can be accessed by derived classes

EXAMPLE

PRIVATE

 

Private access is the least permissive access level.

 

Private members are accessible only within the body of the class.

 

Accessibility: 

• Cannot be accessed by object
• It Can be access with in the class only, with in it’s methods of that class
• Cannot be accessed by derived classes

Example:

PROTECTED

 

A protected member is accessible from within the class in which it is declared, and from within any class derived from the class that declared this member.

 

A protected member of a base class is accessible in a derived class only if the access takes place through the derived class type.

 

Accessibility: 

• Cannot be accessed by object
• By derived classes

EXAMPLES

CODING IN CLASS:

namespace WindowsFormsApplication2

{

    class Class1

    {

        protected int sum=234;

       

      

     }

    class class2 : Class1

    {

      

        public void sub()

        {

            int a=54;

            int b=65;

            int c=a+b;

            System.Windows.Forms.MessageBox.Show(c.ToString());

            System.Windows.Forms.MessageBox.Show(sum.ToString());          

        }

       

    }

}

CODING ON BUTTON:

        private void button1_Click(object sender, EventArgs e)

        {

            class2 ob = new class2();

            ob.sub();

        }

·      EVENTS IN WINDOW ARE PRIVATE

·      EVENTS IN WEB ARE PROTECTETED

·      IN WEB CLASS ARE PUBLIC

·      IN WINDOW CLASSES ARE INTERNAL