access modifier in the dot net

There are 5 types access modifiers in dotnet, Those are :-

Private = Accessible only within class
protected = Accessible within the class as well as within child class
internal = Accessible within the same project
protected internal = Accessible within project and child class out side project
public = Accessible every where

try this link also
C# Access Modifiers Quick Reference[^]

public : The type or member can be accessed by any other code in the same assembly or another assembly that references it.
private: The type or member can be accessed only by code in the same class or struct.
protected: The type or member can be accessed only by code in the same class or struct, or in a class that is derived from that class.
internal: The type or member can be accessed by any code in the same assembly, but not from another assembly.
protected internal: The type or member can be accessed by any code in the assembly in which it is declared, or from within a derived class in another assembly. Access from another assembly must take place within a class declaration that derives from the class in which the protected internal element is declared, and it must take place through an instance of the derived class type.

Check MSDN link.
http://msdn.microsoft.com/en-us/library/ms173121.aspx[^]

There is always msdn if you want to know some new functions, concepts with examples in both Vb,c#

Go through the links to get your concept clear,

C# Access Modifiers Quick Reference[^]

http://www.dotnetbips.com/articles/255f31ac-a304-4063-ad2d-93a790417f3c.aspx[^]

http://www.scribd.com/doc/7783564/vbNet-Access-Modifier[^]

Thank you
cheers

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 5 different types of Access Modifiers.

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

2.Private

Private access is the least permissive access level.
Private members are accessible only within the body of the class or the struct in which they are declared.
Accessibility:
Cannot be accessed by object
Cannot be accessed by derived classes

3.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

4.internal

The internal keyword is an access modifier for types and type members. We can declare a class as internal or its member as internal. Internal members are accessible only within files in the same assembly (.dll).
In other words, access is limited exclusively to classes defined within the current project assembly.
Accessibility:
In same assembly (public)
Can be accessed by objects of the class
Can be accessed by derived classes
In other assembly (internal)
Cannot be accessed by object
Cannot be accessed by derived classes



5.protected internal
The protected internal accessibility means protected OR internal, not protected AND internal.
In other words, a protected internal member is accessible from any class in the same assembly, including derived classes.
The protected internal access modifier seems to be a confusing but is a union of protected and internal in terms of providing access but not restricting. It allows:
Inherited types, even though they belong to a different assembly, have access to the protected internal members.
Types that reside in the same assembly, even if they are not derived from the type, also have access to the protected internal members.



Reference[^]