What is the C# equivalent of friend? [duplicate]

Possible Duplicate:
Why does C# not provide the C++ style ‘friend’ keyword?

I'd like the private member variables of a class to be accessible to a Tester class without exposing them to other classes.

In C++ I'd just declare the Tester class as a friend, how do I do this in C#? Can someone give me an example?

There's no direct equivalent of "friend" - the closest that's available (and it isn't very close) is InternalsVisibleTo. I've only ever used this attribute for testing - where it's very handy!

Example: To be placed in AssemblyInfo.cs

[assembly: InternalsVisibleTo("OtherAssembly")]

The closet equivalent is to create a nested class which will be able to access the outer class' private members. Something like this:

class Outer
{
    class Inner
    {
       // This class can access Outer's private members
    }
}

or if you prefer to put the Inner class in another file:

Outer.cs
partial class Outer
{
}


Inner.cs
partial class Outer
{
    class Inner
    {
       // This class can access Outer's private members
    }
}