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    <blockquote> <p>you can't store a reference to another variable in a class</p> </blockquote> <p>You can, people do it all the time. Simply assign it to a (private) field.</p> <blockquote> <p>so when I do new C(ref one); [snip /] later on after one is updated in A it's like C no longer knows that its still supposed to be pointing towards one </p> </blockquote> <p>Actually, it does know that, but you should assign <code>one</code> to a member field. Assigning to objects is nothing more then setting a reference to the object. Changing the object, changes them everywhere you've assigned it:</p> <pre><code>class A { public string Hello { get; set; } } class C { private A myA; public C(A a) { myA = a; } public A GetMyA() { return myA; } } // somewhere else: A someA = new A(); someA.Hello = "Hello World"; C someC = new C(someA); someA.Hello = "Other World"; Console.WriteLine(someC.GetMyA().Hello); // this will print "Other World" and not "Hello World" as you suggest </code></pre> <p><em>PS: since you were posting pseudocode, I hope you don't mind me simplifying it a bit. If I misunderstood your question, then please disregard (and perhaps clarify, if possible).</em></p> <p><em>PPS: rereading your (edited) code and still trying to figure out what the problem is, there seems to be nothing that prevents <code>C</code> in your code from keeping a member with a reference to <code>A</code> and calling <code>a.Add</code> will obviously reflect the member variable in <code>c</code> as well. Indeed, no need for <code>ref</code> here.</em></p>
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