Access modifiers in C#

Dot.Net Tutorials

aAccess modifiers

• ·          Public                          Access not limited
• ·         Private:                        Access limited to the containing of the class or a type
• ·         Internal:                       Access limited to the containing of the program only
• ·         Protected:                    Access limited to the containing class or types derived from the  
•                                                                                                                    contained class
• ·         Protected Internal:         Access limited to the program or types derived from the class

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Example for public

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace demo_18

{

   public  class test

    {

        public int x;

        public int y;

    }

    class Program

    {

        static void Main(string[] args)

        {

            int result;

            test test1 = new test();

            test1.x = 5;

            test1.y = 10;

            result = test1.x + test1.y;

            Console.WriteLine(result);

        }

    }

}

-- In the above program, class 'test' is initialized with public access modifier, hence that class is accessed by another class i.e., program

So we would get the output as

Output:

15

... press any key to continue

 Private :

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace demo_18

{

   private  class test

    {

        public int x;

        public int y;

    }

    class Program

    {

        static void Main(string[] args)

        {

            int result;

            test test1 = new test();

            test1.x = 5;

            test1.y = 10;

            result = test1.x + test1.y;

            Console.WriteLine(result);

        }

    }

}

In  above namespace, demo_18 class test is intizlised with private access modifier, where the accessibility of the test class is limited to the class test only... So above program with produce error..

" Error 1 Elements defined in a namespace cannot be explicitly declared as private, protected, or protected internal D:\Suresh Babu\demo_18\demo_18\Program.cs 8 24 demo_18"