Reference to reference in C#?

Question

As we all know, C# classes object are treated as references, so what happens when you pass a reference object as a reference to a method? Say we have:

public cla         


        

Answer 1

When you pass a object as parameter of a method, you pass a new pointer that references to the original object. If you pass a object as ref parameter, you pass the same pointer that uses the caller method. An example,

public void F(ref A a, A b){
    a = new A(1);
    b.Property = 12;
    b = new B(2);
}

public void G(){
    A a = new A(0);
    A b = new A(0);
    F(a,b);
    System.Console.WriteLine(a + " - " + b);
}

The output is 1 - 12 because the pointer of object b doesn't change but the original object changes.