RE: Passing arguements by reference

You never pass actual objects, but references to those objects.

When you pass a reference to an object by 'ref', you are passing the actual
reference to the object - this reference can be changed by the method upon
return.

When you pass a reference to an object by value, you are passing a copy of
the reference to the object - this reference cannot be changed by the method
upon return.

For both cases, the method can manipulate and change the internals of the
object, since a reference and a copy of a reference point to the same object.
--
David Anton
www.tangiblesoftwaresolutions.com
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"Andrew Bullock" wrote:

Hi,

I have two classes, A and B,

B takes an A as an argument in its constructor:


A a1 = new A();
B b = new B(a1);

///

A a2;
public B(A aa)
{
a2 = aa;
}




However, I figured that I could reduce memory usage and increase
performance by passing aa by reference.

How do I alter my code to do this?

I know I need to do this:

public B(ref A aa)

but how do i declare a2? If i leave it as it is, does that mean a1 and
a2 both point to the same memory location, or when assigning a2 is the
object copied?


Thanks

Andrew

.

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