C# Access Specifiers

These are used to control the visibility of the class members from outside the world.

They are used to set the scope of the members.

Access Specifiers can be applied for variables, properties and methods(functions)

Types of Access Specifiers

1. private
2. protected
3. internal
4. protected internal
5. public

Scope of the Access Specifiers

Access Specifiers	Same namespace(Assembly)				OutSide the namespace(Assembly)
	Same Class	Sub Class	Non Sub Class		Sub Class	Non Sub Class
private	ü	X	X		X	X
protected	ü	ü	X		ü	X
internal	ü	ü	ü		X	X
protected internal	ü	ü	ü		ü	X
public	ü	ü	ü		ü	ü

Default access Specifiers

If no access specifiers are mentioned for a class, variable, property or methods, C# itself assigns access specifiers for these types.

1. A class has a default access  specifier as internal. A class defined directly in a namespace cannot be explicitly declared as private, protected, or protected internal.
2. An enum has a default access specifier as public.
3. An interface has a default access specfier as public.
4. A struct has a default access  specifier as internal.
5. A method, field, and property has default access specifier as private.

Syntax:

namespace [name_of_the_namespace]

{

    [access_specifier] class [name_of_the_class]

    {

        //Variable declaration

        [access_specifier] [datatype1] [variable_name1],[variable_name2],[...];

        [access_specifier] [datatype2] [variable_name3],[variable_name4],[...];

        //method declaration

        [access_specifier] [return_type] [name_of_the_function1]([parameters])

        {

        }

        //method declaration

        [access_specifier] [return_type] [name_of_the_function2]([parameters])

        {

        }       

    } 

}