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PODetermine Calling Object Type in C#
 

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    <p>Regardless of whether or not this is a good idea, is it possible to implement an interface where the executing function is aware of the calling object's type?</p> <pre><code>class A { private C; public int doC(int input) { return C.DoSomething(input); } } class B { private C; public int doC(int input) { return C.DoSomething(input); } } class C { public int DoSomething(int input) { if(GetType(CallingObject) == A) { return input + 1; } else if(GetType(CallingObject) == B) { return input + 2; } else { return input + 3; } } } </code></pre> <p>It seems to me like this is a bad coding practice (because the parameters don't change, but the output would) but aside from that is it possible?</p> <p>I'm in a situation were I want a few specific types to be able to call a certain function, but I can't exclude access to the function. I thought about having a "type" parameter</p> <pre><code>DoSomething(int input, Type callingobject) </code></pre> <p>But there's no guarantee that the calling object would use GetType(this), as opposed to GetType(B) to spoof a B regardless of their own type.</p> <p>Would this be as simple (relatively simple) as examining the callstack?</p> <hr> <p><strong>EDIT</strong> </p> <p>Please vote up JaredPar's answer (if you want) as well as John Feminella's. I could not mark both answers as accepted, and I accepted John Feminella's answer because it is specifically what I asked for, as opposed to Jared's answer which brought up a solution which I had not previously considered. </p>
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    1. COCould you give a little more background? Cause now I don't see why you don't just implement seperate methods in C. Something like C.DoSometingA and C.DoSomethingB. Or even better: but the behaviour in the A & B classes.
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    2. COThe short version is that I would end up have 30 or 40 identical functions that were simply off by one or two lines.
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    3. CO@devinb: See the edit I made to my post below. You may want to consider opening a different question.
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